This would be my advice, first, if you haven't already, try to contact your aunt. Any other non jw relatives you may have somewhat nearby.
Do as good in school as you can, you want to try to get scholarships, etc. If any program to start college in junior or senior year try for that as well. Apply for all scholarships! One thing that stinks is even though a pell grant can get you through community college if you have no income, if you're under 23/24 then your parents income can void that, even if you don't live with them and even if they aren't giving you a penny. So try real hard to get scholarships!!
Keep contact w/ aunt/etc by email and don't let your parents know, as you know might get shunned or problems. But when you talk to aunt, etc, try to explain the situation, see if it's possible to be a roomate. You can work part time and do college. You pretty much just need to get through college, depending what you want to do, I suggest a 4 year + degree for better long term but an AS is something specialized is better than nothing. You MIGHT also be able to get your parents to agree to an AS, seems society is okay with AS degrees since short and give a technical school. Then you could move out or go onto BS degree.
While in college try to get a job in something related. Once you graduate from college, if you chose the right major and able to get work then you should be fairly independent and able to support yourself.
IF YOU DON'T DO something similar as stated above......then these could be the scenarios. Parents will push you to pioneer/etc, if you follow what your parents want you won't get college and they'll want you to marry a jw guy. You will be dependent on them or who you marry. If you play along, didn't do college, etc, then if they decide to kick you out or you go crazy and cling to anybody who will take you, even if not a right match.
You have a good chance since you woke up now to have a really good life and future ahead. I really started to wake up when I was 29, got a plan and started fixing my life when 32, I'll have my BS in another 1.5 years (When should have had it over 10 years ago. Better late than never but I lost many good years)