I love designing online!

I found a couple of great websites online that I can design lamp shades and even website templates. I love to be able to mix the colors and come up with different shades and mixes. I never knew that I would like doing this, so now I have to figure where to go with it. At 54 I'm not sure where I would go to advance this skill without spending 4 years in school. Does anyone have any ideas?