You'll probably figure out what you want to do in college. Make sure you explore your interests, go to the career center and find out about possible future jobs in the areas you're interested in, and see if you can get an internship or an interview/shadow day with a professional in that field somewhere.
But hey I haven't been to college yet either, so those are some of my best guesses at figuring this stuff out

Are you a senior this year? (I am).