I wanted to learn all disciplineseverything although my English was not really good at thisat time. I wanted to learn everything although my English was not really good at that time.

I wanted to learn all disciplinesevery skill although my English was not really good at this time. I wanted to learn every skill although my English was not really good at this time.

disciplines is too formal a word for language skills here.

Moreover, I learned my vocabulary with an app called Quizzlet. Moreover, I learned my vocabulary with an app called Quizlet.

ThereIt is a website, where you can wricreate your own learning flashcards. It is a website where you can create your own flashcards.

ThereIt is a website, where you can write your own learning cards. It is a website, where you can write your own learning cards.

"There is a website" just specifies that a website exists. Since you're describing the website you just mentioned, you want "It is a website" here.

That's all good ideas, but my improve isment through these learningsmethods are a little bit slower. That's all good ideas, but my improvement through these methods are a little bit slow.

That'sey’re all good ideas, but my improve isment through theose learnings a littlestudying methods was a bit slower. They’re all good ideas, but my improvement through those studying methods was a bit slower.

That'sey're all good ideas, but my improve is through these learningment with these tools is a little bit slower. They're all good ideas, but my improvement with these tools is a little bit slow.

"That's" is, despite the "s", singular. You want "They're" here since you're talking about multiple ideas. "improve" is a verb, "improvement" is the corresponding noun. "slower" is used when comparing to something, but you haven't mentioned what you're comparing to, so better to use "slow" here.

Particularly my speaking skills, which I didn't many times had learnedpractice much (?). Particularly my speaking skills, which I didn't practice much (?).

Particularly my speaking skills, which I dihadn'’t many times had learnreally practiced. Particularly my speaking skills, which I hadn’t really practiced.

Particularly my speaking skills, which I didn't many times had learned. Particularly my speaking skills, which I didn't many times had learned.

I'm not quite sure what your intended meaning is here. Some possible options: "Particularly my speaking skills, which I didn't spend time on" if your point is that you didn't practice speaking much "Particularly my speaking skills, which I often found I hadn't learned enough of" if you thought you had learned enough, but found it difficult to use.

I`’m a bit frustrated about the fact, thatat, because I`’m still shy when I talk to someone in English. I’m a bit frustrated about that, because I’m still shy when I talk to someone in English.

I`m a bit frustrated about the fact, that I`m still shy when I talk to someone in English. I`m a bit frustrated about the fact that I`m still shy when I talk to someone in English.

You actually might pause here when speaking, but the comma implies the two thoughts are less related than they are. I think it's better to leave the comma out when writing because of that.

I really want to be able to speak fluently onby the end of the year 2025. I really want to be able to speak fluently by the end of 2025.

I really want to be able to speak fluently onby/at the end of the year 2025. I really want to be able to speak fluently by/at the end of the year 2025.

"on the end of the year" is wrong, see the graph linked earlier for some guidelines. Here "by" or "at" can both work. "by" emphasises the time that passes and the process of getting there more, while "at" is just about a specific time.

Currently I stay in myam on vacation and I have enough time to learn English. Currently I am on vacation and I have enough time to learn English.

Currently I stay in my’m on vacation and I have enough time to learnstudy English. Currently I’m on vacation and I have enough time to study English.

Currently I stay in my'm on vacation and I have enough time to learn English. Currently I'm on vacation and I have enough time to learn English.

You can stay "at" somewhere "for" your vacation, but you don't say "stay in vacation". Instead you say that you're "on vacation" to indicate it is currently your vacation.

It was a few months ago asthat I started with my English journey. It was a few months ago that I started with my English journey.

It whas been a few months ago assince I started with my English learning journey. It has been a few months since I started my English learning journey.

It was a few months ago aswhen I started with my English journey. It was a few months ago when I started with my English journey.

"As" isn't used here, you can say "it was a few months ago when I ..." or "it has been a few months since I ..."

Actually I began on August with my first steps in August. Actually I began my first steps in August.

Actually I began oin August with my first steps. Actually I began in August with my first steps.

In vs on on dates in English often confuses people. You can find images like this to give you some guidelines: https://i.pinimg.com/originals/a9/d3/99/a9d39965fe9bcaeb6866dbce11ce9676.jpg . In this case, months are quite a general concept, so you do something _in_ a month.

Until now, I preparedI have tried many different ways to improve my language skills. I have tried many different ways to improve my language skills.