Hi, confliction and welcome! Because of your age and circumstances, I think the slow fade is the best option for now. The good news is that you're young, you've got your whole life ahead of you and you don't have a JW spouse and children to deal with. Believe me, theocratic parents are hard but a spouse and children whom you love dearly are harder, simply because it's natural to make a break from your parents (move out, etc.) and not so much from your husband/wife.
So, the slow fade. You can do it, especially if your parents accept that you're depressed. That's a legit reason to skip the occasional meeting, to slow down in fs, etc. One of the most important things to do right now is to prepare for your future. One of the other posters suggested pulling up your grades so as to qualify for a scholarship to college. If you can swing moving away to college, your fade is in the bag. If not, saving $$, as you mentioned already, to move out and preferably away, to a different locale, will make things oh, so much easier. Remember, this is your life. It's the only one you get and you'd damn well better make it exactly the way you want it. That sounded dreadfully selfish, but I didn't mean it that way. Doing things for others, helping make the world a better place, giving $$ to charity, that's all part of happiness. But it's your choice, that's my point.
Keep reading--we've had other posters in very similar age/circumstances. And please keep us informed!