My jJourney lLearning eEnglish and its uUps and dDowns

It's common to capitalize the first word and all other nouns in titles.

On top of that, our brain plasticity apparently declines after a certain age, and we do not have as many spongy neurons aslike children; do—not to mention the interference of our mother tongue.

The longer dash, the em dash (—), seems better in place of the semicolon.

An em dash sets off a bit of extra yet important information. It has an effect that I can't really describe... It just feels right.

Using a semicolon would need two more closely related bits of info. You could use it here like this: "On top of that, our brain plasticity apparently declines after a certain age; we do not have as many spongy neurons like children do."

I started my journey towards fluency in English back in 2016; however, I was clueless, I could. Yet I was able to make a decent improvement in the language in the first couple of months, at least, regarding fixatlearning new words.

Fast forward from 2016 to 2018, w. Within these two years, I basically stagnated at a lower-intermediate level due to lack of consistency and attempts to speak with others in the target language.

By the middle of 2018, an opportunity to apply for a schoolarship arose, which would provide financial aid for students to study abroad, arose, but. However, the foreign universities were demanding a high level of proficiency in the target language.

That I could be discardedturned down for the scholarship demovittivated me, since I was not sure if my eEnglish was sharp enough to get me through the application for the schoolarship.

On the positive side, my grades were pretty good and could hlead me to come out on top against the other applicants.

Two other phrases for "On the positive side,":

On the other hand,
On the bright side,

On August 15th, I applied for the schoolarship and, unexpectedly, my home college unexpectedly approved my application and, granteding me athe fundings to get me through six months in the USA.

Your original paragraph sounds ok spoken out loud, but to make it sound a bit more put together in writing, I rearranged it in my revision.

In January 2019, I landed in the USA and was havinghad a hard time to getting myself across, and tha. It was wthen that I came to the realization that a long journey was ahead of me.

During the first four months, I was taking etook English classes but would always would hesitate to speak, and hadby then I had only made a few colleaguesfriends [because my English was poor?].

The second part:

"and [I] had made few colleagues"/"and by then I had only made a few friends"

seems a bit incomplete.

I would expect a reason, because it wasn't clear if it was because of your English or just by circumstance.

It was really frustrating and lonely during these months, but, without realizeven noticing, I was improving more than I could have ever imagined.

Just some extra words, namely "even" and "ever".

I think they fit especially well in the phrases "Without even noticing" and "Than I could have ever imagined".

They aren't required, but adding them sounds more native-like, since they just flow naturally.

Five months had gone by, and I decided to prolong my time in the UsaSA for six more months sinc. This was because I had found a job as a student worker and wanted to strainchallenge myself to better my eEnglish.

After the first half of the year, I began to live with two of my american friends, and thatwhich was when my eEnglish took off dramatically took off, and t. This even started diminishing my pPortuguese, which was getting rusty.

Despite my notariousiceable/notable improvement, I would still feel intimidated when interacting with many native speakers at once and, sometimes, just stay quiet.

"Notorious" has a negative connotation/meaning, with the image of being well-known for a bad thing.

In January 2020, I went to Las Vegas on my own, and I was amazingly. Amazingly, I was speaking eEnglish smoothly and with little to no problems.!

As I see it, this is a moment where an exclamation mark would be appropriate. It's an accomplishment, and I'm assuming you're excited about it, so use an exclamation mark!

On 20th of January, I left for Brazil, and areturned to Brazil. As weird as it may seems, my firstnative language was really rusty as if English were obscuring it.

Then, I realized how much I had improved; perhaps, I aI'm not nearly an awesome speaker yet, but surely way better than one year ago.

In conclusion, since I got back from Tthe UsaSA, I have been using English daily and looking forward to achieving fluency, knowingarmed with the knowledge that learning a language dgoes not really have a ending.on without end.

I used two other phrases: "armed with the knowledge that" and "goes on without end". These phrases work here, and can be used to make your writing more native sounding.

On top of that, our brain plasticity apparently declines after certain age, and we do not have spongey neurons that we had as children; not to mention the interfence of our mother tongue.

I started my journey towards fluency in English back in 2016; however, I was clueless, I could make a decent improvements in the language in the first couple of months, at least, regarding fixatlearning new words.

Fast forward from 2016 to 2018, within these two years, I have basically stagnated at a lower-intermediate level due to lack of consistency and attempt to speak with others in the target language.

By the middle of 2018, an opportunity to apply for a schoolarship, which would provide financal aid for students to study abroad, arose, but the foreign universities were demanding a high level of proficiency in the target language.

The fact that I could be discarded demovittivated me since I was not sure if my eEnglish was sharp enough to get me through the application for the schoolarship.

On the positive side, my grades were pretty good and could hlead me to cometo me coming out on top against other applicants.

It reads a lot easier this way

On August 15th, I applied for the schoolarship and, unexpectedly, my home college approved my application and granted me a funding to get me through six months in the USA.

In January 2019, I landed in the USA and was having a hard time to getting myself across, and that was when I came to the realization that a long journey was ahead of me.

During the first four months, I was taking english classes but would always would hesitate to speak and had made few colleaguefriends.

Colleagues are people you work with in your paid job that you do for a living. So in this context it would be your friends

It was really frustating and lonely during these months, but, without realizing it, I was improving more than I could have imagined.

Five months had gone by, and I decided to prolong my time in the UsaSA for six more months since I had found a job as student worker and wanted to strainpush myself to better my english.

After the first half of the year, I began to live with two aAmerican friends, and that was when my english dramatically took off, and timproved. This even started diminishing my portuguese, which was getting rusty.

Despite my notariousvast improvement, I would still feel intimidated when interacting with many native speakers at once and, sometimes, just stay quiet.

In January 2020, I went to Las Vegas on my own, and I was amazingly speaking eEnglish smoothly and with little to no problems.

On 20th of January, I left for Brazil, and as weird as it seems my first language was really rusty. It was as if English were obscuring it.

Then, I realized how much I had improved; perhaps, I am not nearly an awesome speaker yet but surely way better than one year ago.

In conclusion, since I got back from Tthe UsaSA, I have been using English daily and looking forward to achieving fluency, knowing that learning a language does not really have a ending.

On top of that, our brain plasticity apparently declines after certain age, and we do not have as many spongy neurons as children; not to mention the interference of our mother tongue.

I started my journey towards fluency in English back in 2016; however, I was clueless,. I could make a decent improvement in the language in the first couple of months, at least, regarding fixatingpicking up new words.

Fast forward from 2016 to 2018, within these two years, I basically stagnated at a lower-intermediate level due to lack of consistency and not attempting to speak with others in the target language.

The fact that I could be discarded demovittivated me since I was not sure if my eEnglish was sharp enough to get me through the application for the schoolarship.

On the positive side, my grades were pretty good and could headlp me to come out on top against other applicants.

On August 15th, I applied for the schoolarship and, unexpectedly, my home college approved my application and granted me a funding to get me through six months in the USA.

In January 2019, I landed in the USA and was having a hard time to getting myself across, and that was when I came to the realization that a long journey was ahead of me.

During the first four months, I was taking eEnglish classes but always would hesitate to speak and had made few colleaguefriends.

"colleagues" means people you are employed with.

Five months had gone by, and I decided to prolong my time in the UsaSA for six more months since I had found a job as student worker and wanted to strain myself to better my eEnglish.

The word "strain" and "better" are correct, but a little odd here.

I think "wanted to stretch myself to improve my English" sounds better.

Despite my notariousmarked improvement, I would still feel intimidated when interacting with many native speakers at once and, sometimes, just stay quiet.

"notorious" is almost always a bad thing! This sentence was funny :) Great otherwise.

On the 20th of January, I left for Brazil, and as weird as it seemsed my first language was really rusty as if English were obscuring it.

Then, I realized how much I had improved; perhaps, I am not nearly an awesome speaker yet but surely way better than one year ago.