Hello, it's my first tryattempt to write something here.

I wannat to improve my eEnglish.

I don't know how do work this platform, but I think I'll understandfigure it out.

My eEnglish is very bad, but tryna do something withI’m trying improve it.

Hello, it's my first tryime to write something here.

I wanna improve my eEnglish.

I don't know how dto workuse this platform, but I think I'll understand.

My eEnglish is very bad, but I want to tryna to do something withabout it.

Hello, it'this is my first try toattempt at writeing something here.

This sounds more natural to me - attempt instead of try.

I wannat to improve my eEnglish.

English should be capitalised.

I'm sorry for my stupid mistakes in this text.

I don't know how do work this platform, but I think I'll understand it eventually.

My eEnglish is very bad, but trynaI'm trying to do something withto improve it.

Hello, it's my first trying to write something here.

I wannat to improve my english.

Your way was also OK for being informal

I don't know how dto work this platform, but I think I'll begin to understand.

My english is very bad, but trynaing to do something with it.

Your was was OK too

Hello, it's my first try to write something on here.

I wanna improve my eEnglish.

Just keep in mind "wanna" is a very casual word. It's good for texting or social media, but avoid it in formal writing like essays or emails.

I don't know how dto work this platform, but I think I'll understand eventually.

My eEnglish is very bad, but tryna do something with it.

Same with tryna - it's a very casual word. It's fine to use in these journal entries but avoid it if you want to write emails or essays in English.