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RGB vs CMYK? Rasterize vs Vectorize?
"I just want to paint!" you may say. 
We get it.

RUMORS               COLLEGE

RGB vs cmyk

RGB = Web
CMYK = Printed Materials

rasterize vs vectorize

Everything you interact with was designed and decorated by someone. It is a real job. 

do I need to go to college?

You should get an education and learn your foundations. College and the alternative can offer great opportunities, but its entirely up to you to control your education.