I am worry worried about education. - In English we use the past tence for worried, even if we are worried in the present tence or future tence, but you can also say if you want "I worry about education" which means you currently worry in this moment.

Actually, I was a university student in the U.S for a year. - "actually" dosent fit well in this sentence because its too premature to use it.

But, I have had to go back to Korea because the university that I went to was closed by bankruptcy because it went bankrupt. - use 'have' if you are still in the US and is talking about in the future. Use 'had' if you are talking about you are now back in Korea talking about your experience.

"Because it went bankrupt and my parents are not rich." Would be one sentence, try to not use 'and' to start a sentence.

And my parents are not rich something. - 'something' does not make sence.

And I really wanna want to (this depends how formal you want to be, wanna is still correct, depending on who you are speaking to) study in U.S. My major is Game of Visual Arts. I have to talk with my mom.

Hope this helps! ^_^