Going to college for it would be great. Fantastic even. But it's only really necessary for the professional side of things. Don't wait until you're amazing to start churning out material.
Watch a shitload of tutorials, read The Animator's Survival Kit, practice drawing as much as you can, and get to work!
You don't have to be amazing right off the bat. I think flash is a real learn as you go type of thing. If you've got ideas, don't sit on them for too long. Get to animating!
Have fun, and good luck!
Also, an NG search for "Animation Advice" could help. I'm sure you'll find a lot of information more helpful than my own.