Who do you want to become in the next 10 years? How will US higher education help you achieve your ambition
(Read my whole answer because I'm not sure it'll be clear unless you do so.)
Rather than asking about careers, they're basically asking you two things:
---Why do you want to go to college?
---Why do you want to go to college in the United States?
The best way to answer this is to
tell what KIND of person you'd like to be in ten years. Pick a couple of personality traits you'd like to have and then tell why you'd like to have them. Also, tell how ONLY a college education
in the United States will help you to attain these "character goals."
You start to do this a couple times in this paper but you don't go nearly far enough:
build my confidence
discovery and exploration
how to learn
Start anew, elaborating on the above ideas. Little else in the first draft you posted will prove very useful to you.
Your grammar is indeed a problem but it doesn't matter until your ideas are collected and organized.
You have the
beginnings of a very special paper here (and I don't say that very often).