Mariana, you're in the right community for improving your skills. :)  If you don't mind, I've made some corrections. If you have any questions, just ask and we'll be glad to help.

I'm not going to write 'how to improve my English' here because I've seen many phrases just like that

I know it depends on me and not anyone else to say what I should do. I know I make many errors, but if I don't try to write I won't improve. I'm sorry if this is very unpleasant for you to read because of my errors, but if I don't write this I won't improve. I'm studying every day and I hope nobody teases me (I've seen this word in a dictionary).

The best part about your text is that you want to try new words ("to tease") - yes, definitely do that! It was the right word in this context.

Thank you Peachy,

Your comment is very supportive. (Google translator help)