I took a class (in Spanish, with subtitles!) on watercolor painting, with a focus on the cosmos! What a fun thing to do - I learned so much about how to use watercolors, which had always been a pretty scary thing to attempt.
So, here is what I learned - with the proper instruction, all sorts of things can be learned. It's really more about motivation ("want to") that anything else. Interesting concept, that. Motivation is the key!