What Giordino said!
I know many young people who have little to no support from family and are going to college or trade school. Will they have debt? yes, but they also have freedom of mind while doing so, they have the freedom to choose to go to college or learn a trade. A few of these kids work on campus and work as advisers to be able to stay in the dorms without getting an apartment. No, they don't really like being seniors with babysitting jobs (immature freshmen) but it pays the bills so to speak.
There are also many great online colleges & degrees if you do some research on it.
At some point won't your jw parents try to tell you that you are spending too much time on college/homework anyway?
If you continue going door to door will you be able to live with yourself if actually managed to bring somebody into this insidious cult knowing what you know now?
Lots of places are hiring seasonal workers right now, in fact I have not been in one store/restaurant etc... that has not had a help wanted sign up. Might not be your dream job but if it helps you to achieve your goals why not?
It is not your responsibility to keep the family together and in agreement. Your job is to live your life. Part of becoming an adult is knowing that you cannot make everybody happy. Your parents and extended family have all made their choices, now it is your turn.
Wishing you a joyful full life!