Jolie, this is really clear writing!  I only have a few small corrections.

I've just known learned that "check" in American English means "cheque" in British English.

This morning, I sent an email to an American team with the term "cheque" and they replied to me with the term "check". I also find out "a quid" means "a pound" in British English. Last night when watching "How I Met Your Mother" Season 8, I heard the characters mentioned "prenup" instead of the full phrase, "prenuptial agreement".

The above things my English teacher didn't teach me. That could explain why I've studied English for nearly 10 years but my level is just at, maybe, upper intermediate or lower advanced. And I'm still so scared when communicating with native speakers.

I think I'm on the right track now--just continue to learn English consistently, and it must be improved day by day.