I did three years at college, but really should have left it at one. The first year I got shown things that were useful, like never mix in black paint to anything, look up and you'll see stuff, draw what you see, not what you think you see- people are not pink, that sort of stuff.
My next course started out with 'there is no right or wrong way to do things, it's all art', followed by being continually told I wasn't doing it right
I realised I wasn't learning a damn thing and eventually wandered off, bored, to draw elsewhere. I havent looked back since.
That first year was invaluable, and I can see those who've learnt these lessons and those that havent, but since then my work has progressed through practice and observation. The mediums I now work in I never played with at college.
so, after all that, I'm guessing- mostly self taught