Go to school. Not flight school, college. Have fun growing up. Airplanes will be there when you graduate.

Instruct while you're working on a degree in something that interests you (doesn't have to be aviation, in fact I'd suggest against it). Pay for as much of your degree and ratings out of pocket to avoid having a ton of debt. By the time you graduate you don't have to worry about ATP mins for an airline job, you hopefully have experience flying in conditions you won't see going through your ratings as fast as possible at ATP, and you'll have something to fall back on when (not if) the industry tanks.

I don't fly for a living any more, but I work in aviation. I spent almost 2 years working different jobs and traveling between graduation and getting my CFI and it was some of the best experiences in my life. It was also really good when the industry tanked in 08, I found myself on the street and I needed to pay the bills with something other than flying an airplane.