"I want to invest in a paint program, but I vasilate between what to get...I here you can paint in CS?! "

Take a look at the 2d gallery at CGtalk. A LOT of people paint with Photoshop. I paint most of my textures in Photoshop, though I also have Painter and Art Rage.

Talent is God's gift to you. Using it is your gift to God.