I wish you the best of luck, man. It'll be rough just trying to adjust, but you seem determined enough to do it. I hope everything goes well for you.
I thought about going back to my country of origin right out of high school, but I eventually decided to stay simply because I was 17 and the thought of leaving my immediate family behind to start over somewhere I didn't even remember was a bit hard to handle.
If something happens with immigration before you graduate, would you still leave?