My June

My June

No change suggested

definitely works, but it's stylistic speech. "My June Diary" or just "June" may be more clear.

Today I'm want to talk about mywhat has happened in June.

also keeps the stylistic speech. "what has happened in June" specifies you are referring to action

This month was very busy , because I had exams and graduation.

No change suggested

Because graduation is an event separate and posterior to your exams, I would recommend to split this sentence up. "This month was so busy with exams! And I got to graduation, which was busy too."

I have finished 9 grade.

No change suggested

In the US, 9th grade is a freshman in high school, so like 14-15 years old. If you're in 9th grade, you didn't graduate, you only moved up a grade. Graduation means to leave an institution of learning with a diploma. You receive your high school diploma after 4 years of education.

In my country, June was so cold,so that I didn't even walk in the city or near homein the neighborhood.

"so cold that" is the preferred comparative construction "June is so cold, so I..." by putting "June is cold" in the present you are generalizing to every June and you split the meaning of the sentence, which warrants the "so" which is a coordinating conjunction. "June was so cold that..." by putting "June was" in the past you are personalizing this June to the June you personally experience, so you combine the meaning of the sentence. "near home" is technically understandable but a bad style choice. "home" is an affectionate term for the place or area you live in and are attached to, whereas "house" is a physical object in the world. "near" is a preposition of place which prefers a physical object. "near the house" > is a location by a physical place But if you'd like to keep this affectionate undertone, I'd recommend "in the neighborhood" because it's a physical location that also implies an affectionate tie to the area.

But I started self development-improvement, which hasand I've already begun to see good outcomes.

"self-improvement" is the conventional term for this idea "already has good outcomes" < already shouldn't modify "good", it should modify "has good outcomes", hence why I put it at the beginning But, an "outcome" is "That which is produced or occurs as a result of an event or process" Self-improvement doesn't not produce anything on its own and requires a person to perform a process. Outcome is the RESULT, but self-improvement is a continuous process. "I've started a self-improvement regime, which is already showing some good results" is another alternative that avoids "outcomes"

When you start developmentself-improvement, you see your changesyourself change and better understand yourself better.

"better" modifies "understand yourself" "you see your changes" < I understand why you phrased it this way. But, when you "own" a change, it's implying that you've made a change to a document or some other thing. "You can see your changes in the version history section of the document". So, instead I would recommend the verb to make your intention clear.

I hope that I will be better.

No change suggested

Yes, this 100% works. But stylistically, know that "be better" implies that you are morally a bad person and wish to be a better person. I would recommend "I hope I will become a better version of myself" < this is a phrase you will hear a lot if you watch self-improvement videos on youtube

Also, in June my dad had adad's birthday,and I'm with my class noted our graduation was in big house.June

"it was my birthday" is more conventional. It's the same construction as "it is raining. It is Monday. It is your turn". I'm sorry, not to be rude but I do not understand this second sentence.

In reality, my class wasn'tclassmates aren't good people, they're selfish and they'rethey have many bad habits.

*my class can be ambiguous between your classmates or the academic concept of the class. "Classmates" makes it clear you're talking about poeple "good" is an adjective. It needs a noun. "they're" means "they are", you accidentally put two verbs next to each other "they have many bad habits" is the better form

I don't like this kindthese kinds of people.

*kind of people Don't forget the "of" for "kind of" "type of" "group of"

Today I'mI want to talk about my June.

This month was very busy , because I had exams and my graduation.

I have finished 9ninth grade.

In my country , June was so cold ,so I didn't walk in the city or near home.

But I starteddid start self development, which has already had some good outcomes.

Or "I started self development...". The "But" means a contrast to previous sentense, so "But I did..." contrasts the "I didn't walk"

When you start self development, you see your changes and better understand yourself.

Also, in June my dad had a birthday, and I'mI, with my class noted, celebrated our graduation in a big house.

In reality, my class wasn'tclassmates weren't good, they're selfish and they'rethey have many bad habits.

I don't like thisthese kind of people.

I feel better when I am alone at school, because I think I'm a little different.

I'm an extrovert, I like talking , but only with good people.

Today I'mI want to talk about my June.

This month was very busy , because I had exams and graduationI graduated.

In realityHonestly, my class wasn't good, they'rethey were selfish and they're havehad many bad habits.

I don't like thisthose kind of people.