Note: I'm aiming for an American English accendialect.

Accent: the way of speaking, intonation.
Dialect: a version of the language specific to a region

I saw another user correct you to use accent on a previous journal but I would have felt rude correcting them, but dialect is the proper usage :)!

I've been studying for (the past) 9 months for an important test, I know that if I pass it, it will improve my life, but it includes 10 subjects and the minimum amount of mistakes I can make areis just 14.

Also correct + more natural slightly: I’ve been studying for the past 9 months to pass an important test,…

At first I felt very anxious, I used to avoid studying for it, however, I started studyingacquiring/picking up some learning techniques and they improved my subjects learning journey drastically.

Picking up - colloquial
Acquiring - formal, sophisticated

Either one works!

Today I want to share with you somea few of these learning methods with you. :)

More natural word order

- The Cornell Method

ItThis method consists inof dividing your notebook into three sections: -The column of the ‘questions’ section atis on the left side of the notebook.

Cohesiveness,

-The text section at the right side of the notebookpage.

Notebook - the whole physical book
Page - just a single page

When we do examples involving paper, for example origami, we always refer to it as a single page, not notebook

- The summary section line, down to, which is at the nbotebooktom of the page.

Natural

You can see it in the attached images section of this journal.

Or:
I’ve attached an image of this method in the ‘images’ section of my journal.

Paerfum.e

In English we do headings with no full stops, if you put a full stop at a heading / sub heading this would be grammatically incorrect.

I spray my notes with my favourite paerfume in order to remember more, because the smell has suchcan have this effect.

Have you ever smellt/smelled something and remember a specific situation/ stage of your life?

I set a timer for 30 minutes and then I put myself to rest fortake a five minutes break.

Correct examples:
“She’s taking a five.”
“They’re on their break.”
“I’m taking a break from studying.”

Our willpower is biggreater when it's early, when the sun goes down it start to falldecrease.

I've been studying for 9 months for an important test,. I know that if I pass it, it will improve my life, but it includes 10 subjects, and the minimum mistakes I can make are just 14I am only allowed to make 14 mistakes.

Rewording it this way sounds more conversational and natural.

At first I felt very anxious, and I used to avoid it, h. However, I started studying some learning techniques and they improved my subjects learning journey drastically.

It consists inof dividing your notebook into three sections: -The column of the questions section at the left side of the notebook.

-The summary section line, down toat the bottom of the notebook.

I make some absurd drawings or absurd problems to feel an emotion.

This is important in order to remember what you learn, as it's said that "information + emotion = long term memory" .

Paerfume.

I spray my notes with my favourite paerfume in order to remember more, because the smell has such an effect.

"favourite" = British
"favorite" = American

Have you ever smelled something and remembered a specific situation/ stage of your life?

I set a timer for 30 minutes and then I put myself to rest for five minutes.

Our willpower is bistrong when it's early, but when the sun goes down it start to fallde.

That's why I dotry my best to study in the morning, after I take a shower.