If you've decided, get on hormones asap to stop masculinization. One common thing we ALL share, I think, unequivocally, is we all wish we had started earlier. Doesn't matter when we started, we wish it had been at 17. Actually, 13 would have been better.

See a therapist who deals with this (look online, there are a few who do good stuff via skype for about 100 bucks an hour; steep, yeah, but even one session might be enough to get a referral to a doc. See the endocrinologist, one visit, and you should get a script for estrogen and antiandrogens to turn off your nutz. A lot of us started hormones via mail order and no prescrpt or therapy. I did, i'm glad I did (and got "legit" six months later after I confirmed that it was working well), but I wouldnt recommend it for safety reasons; hormones can be quite dangerous.
My point: being on hormones is not expensive, especially if you order from canada legit meds like I do..... that'll keep you in a good place while you save up or come up with some way to finance other stuff.
Good luck!