[@Superman] Like anyone else. 

I mean if you want them to specialize in something then you can just say they're attracted to said field of study. Of course, let's not bullshit this to people suddenly becoming nuclear scientists. Okay except for Ryo's char maybe.

Wanna be a doctor? Go ahead. 

They learn as anyone else does. So I assume some basics would be easily acquired if they so happen to be particularly attracted to that field.