It sounds like you want to get a college education first before jumping in, but the best way to do it is to just jump in. This ain't rocket science (well, maybe it is for those who fly rockets) so just do it.

My personal recommendation based on your interests is to buy the Concept Models 1/4 scale Fleet. It's a great looking WWI biplane, a great kit that will give you all the building experience you need to tackle tougher projects, and it's not that expensive. It will also give you plenty of opportunities to add scale detail as much or as little as you want.
Hang a Q-42 or a G-38 on the front and you'll have an airplane that will make you proud.

I'm not personally into WWI stuff but I know more than a couple of guys who've built them, and I've flown the Fleet and it flys great.

HIghflight