Maksi, you are doing well! There have been a lot of good suggestions before my comment. So I won't add to the suggestions. I empathize with you. My sweetheart was learning (American) English when I met him several years ago. And that was after having learned (British) English for several years in school in his home country! We do have some unique terms.
Don't be afraid to ask what is meant by something someone writes.
You do a wonderful job communicating. I hope we hear more from you.