I Came Back to My Country From Canada

I've just come back from Canada to my country, Korea.
I think I'm still in jet laggedck. I feel tired early in the evening, and quite often.
My next step is studying in America as an exchange student, 
but I'm worried because I already spent a lot of my parent's money while I was studying English in Canada. 
Actually, I don't want to spend my parent's money any more. I doubt if that I can deserve it, 
because Cuz I'm not sure if I can pay them back after I get a job.( I should get a high-paying paid job then)
and the second reason why I am kind of a hesitating to go to the US is because I'll be separated from spliting from my family again. 
I thought it would be okay if I was apart from my family and friends  had splited from my family and friends, but my life without them in Canada is was quite tough.

BTW By the way, I'd like to study in Costa Rica, cuz because  it's much cheaper to study abroad than most many other of the English speaking countries. So, I should study Spanish. Espano....
Can you give me some advice?
I'm kind of a lost. I wanna want to study Culinary Management,  but I'm not sure if I can could do well in this business.on my businesses.