I left when I was 18 and came out as queer at the same time. It made things rather awkward and hard at home, but I soon left for college. College was a great experience for me in helping me find myself. I met a lot of great people there including my first girlfriend and my current boyfriend. Ultimately Im studying something I have a passion for, more than can be said for anything I ever studied as a witness. I never wanted to pioneer, I felt guilty for not wanting to since I knew I should have.
The best thing for you would be to start saving up some money and maybe look for a few scholarships. The sooner you get on with what you really want to do in life instead of languishing in the control of the WBTS the better it will be for you. Things do get better but you have to recognize that you need to take charge of your situation as difficult as it is, only then can you start to move beyond things.
I know numerous ex-JWs that have gone back to school in their late 30's, early 40's or even later. The difference is that you have so much more time to claim what you want out of life. Instead of being bitter for what you have lost and the time you have wasted, be glad how much of your life you have left to live what you want to live instead of letting some crusty old men tell you what to do with it.
Cheers and good luck.