Chances of getting into East Asia universities

[fektiny 0]

Hey, I'm from Kazakhstan and currently in the 11th grade (first DP year) and I started to worry about getting in university just at the beginning of this academic year. I'm interested particularly in Japanese and Korean universities because of the culture of this nations, but.. last year I had GPA ~3.2 and generally can not boast of really high academic achievements. 

I picked Math, Comp. Science HL and Physics SL and aiming to be a programmer (maybe in software development). Also, I want to know what are the chances of getting full scholarships in both countries. I have spent enough time on the internet but it doesn't really give me the understanding what my chances are and what results I have to reach (e. g. ib grades) to be accepted on universities on the terms of full scholarships. I'm very frightened, but I want to start going forward to my goal as soon as I know:

What are my chances to enter universities in East Asia as an international/IB student (particularly in Japan and Korea)?

Can I count on the aid provided by universities and government?

What challenges and difficulties can I face?