Ever since IFor as long as I can remember, I knew that I'll be doing something related to arts in the future.

You need to add something after the last part, like in the future/as a career/at school

It was easy for me, to see the potenctial beauty in little pieces of paper or wood, and then create something without of that.

But, as soon as I turned seventeen, and High School was over, I had to decide what to do with my life.

And, I decided to go to Med School... to the amezement of - my family and friends were amazed.

... is used to show an unfinished sentence, instead use - to add information

No one understanood my decision.

Nobody knew that being a doctor, was one of my dreams.

H, to help people and be useful to the world.

Connect this to the previous sentence

I enrolled in the Medicinal University, passed the entrance examinations, and start theed my first year there.

Make sure you stay in the past tense

It was, in equal parts,ly amazing and overwhelming.

As soon as you are an officially a student there, not only do they start to teaching you about the human body inside and out.

Because you have put not only... the but should be in the same sentence

B, but you also have to learn how to differentiate the cells of every organ in the body under a microscope, and last but not least,how to open bodies in the amphitheater.

Thise last one, I assume it, was to disappoint the most disoriented.

FI was full of new knowledge and I felt almost magical.

Ironically, the bodies and cells were not the ones that make me rethink about mythis daring decision ofin my life.

It was the books and its contents:; I love books.

I read a lot and in my seventeens, even more, even more in my teen years than I do nowadays.

And that was not my concern, grades never mattered much to me..., but, all that information that my brain did not absorb worriesd me.

It took me precisely four months to understand that precisely thate information that I did not cover, it could be just what it would take to save a life.

So, after long sleepless nights, I went to the director's office, to request my withdrawal.

What he told me, at the moment it, was a shock (-now I know that it was a blessing in disguise).

- shows more important information

He explain to me, that the valid time to quit, was in the first three months of study.

PassingAfter that time, the student should end the study plan.

And the study plan onfor Medicine School was per yearly.

So, if I ever wanted to enter another College career, I needed to end and pass, all the subjects.

Ever since I can remember, I knew that I'll be doingone day I would do something related to arts.

Yes, "ever since" is perfect here :) But "I remember" alone doesn't work with it. I can't exactly explain why.

Here, we "will" (I'll) if we are in the present speaking about the future. But when we speak about the future of the past, something that we had a future intention to do when we were in the past, then we "would".

It was easy for me, to see the potenctial beauty in little pieces of paper or wood, and create something with thatem.

"That" is singular, so if you create something with pieces of paper or wood, then it's with "them". Possibly you mean that you would create something with the beauty? In that case, it's better as "create something with it".

But, as soon as I turned seventeen, and High School was over, I had to decide what to do with my life.

And I decided to go to Med School... to the ameazement of my family and friends.

No one understanood my decision.

Nobody knew that being a doctor, was one of my dreams.

HI wanted to help people and be useful to the world.

You need something introducing this idea. "I wanted to", "So that I could", even just a bare "To", although that would be better joined to the previous sentence with a comma: "... one of my dreams, to help people ..."

I enrolled in the Medicina University of Medicine, passed the entrance examination, and started the first year.

All these things are happening at the same time, so they're all past tense. And of course it's okay to say Medicina University, but that's what it would be in English.

As soon as you are officially a student there, not only do they start to teach you the human body inside and out.,

I can't explain why, but "not only they" is wrong without the "do". And I replace the full stop with a comma so that this becomes one sentence - "not only ... but" is a construction that reads a lot better if it's in one sentence.

Bbut you have to learn how to differentiate the cells of every organ in the body under a microscope, and last but not least, to open bodies in the amphitheater.

Amphitheater is an unusual word to use here. It suggests ancient history, Roman and Greek amphitheatres. The closest meaning I can think of is a big lecture hall where a body is being dissected while students observe. Like this: https://en.wikipedia.org/wiki/Anatomical_theatre - I don't know what word I would use for that!

This last one, I assume it was to disappoint the most disoriented.

It's not clear to me what you mean by this at all. It suggests that the the dissections were intended to disappoint (make sad) the most disoriented students (those who have lost their direction or are seriously confused).

But, to me it was wonderful.

I think you're contrasting what you thought about the dissections with what other people thought? "to me" would make that clear.

Ironically, the bodies and cells were not the ones that makde me rethink about my daring life decision of life.

"rethink" behaves slightly differently to "think". You do "think about something", but you simply "rethink something".

It was the books and itstheir contents:. I love books.

A colon is strange here. In a way it reads as if the contents of the books are "I love books".

I read a lot nowadays, and in my seventeens, even more than nowdayso.

"my seventeens" is very wrong. "My teens" is from age 13 to 19, which is probably what you mean?

But, now the amount of information was brutal.

Adding "now" makes the contrast clearer - you did not have to deal with this much information before medical school, but *now* you did.

For the first time ofin my life, my grades were not high.

And that was not my concern, grades never mattered much to me... but, all thate information that my brain did non't absorb worriesd me.

"didn't" sounds very much more natural than "did not" here.

It took me four months to understand that precisely thatthe information that I did non't cover, it could be justprecisely what it would take to save a life.

"cover" is probably not the best word here. "learn", or "absorb" again would be better.

"precisely" and "just" are doing the same job, and one of them is unnecessary.

So, after many long, sleepless nights, I went to the director's office, to request my withdrawal.

Or "some long, sleepless nights", "weeks of long, sleepless nights", some word to indicate a quantity.

Adding a comma between doubled adjectives like this isn't necessary, but it often makes them read better.

What he told me, at was a shock in theat moment it was a shock ((although now I know that it was a blessing in disguise).

"although" isn't necessary, but it makes an aside like this read better.

He explained to me, that the validproper time to quit, was theduring first three months of study.

"proper" is a variant of "correct" that has the implication of *doing things* in the correct way. I think it's the word that works best here. "valid" doesn't work very well.

Passing that time, the student should end the study planOutside of that period, the student must finish the semester.

These three sentences are difficult to understand - I'm guessing at what you mean.

And the study planemesters at the School onf Medicine School was per yearwere each a year long.

"Medicine School" is grammatically fine, but I don't think anyone ever says it. "School of Medicine" or "Medical School" would be the usual terms.

So, if I ever wanted to enter another College career, I needed to endcourse at the college, I needed to finish the semester and pass, all the subjects.

College being in capitals here suggests it's part of the school's actual name - like "National College of Medicine", or something. If that is the case, then "the College" is a correct way to refer to it.

So, I endfinished that first year.

Not universally true, but I think usually safe to assume: Finishing is the subject acting on the object, ending is intransitive, the subject acting with no object. You finish the race; after every runner has crossed the line, the race ends.