Good idea, and congratulations for taking charge of your life.
In your case, you landed on your feet, but I wish there was a way to warn transgender people to BE QUIET about it at first around parents, spouses, family, or anyone who could try to stop, or punish them.
Better to quietly google a LGBTQ center, get some counseling, start hormones, and just transition without calling attention to it. By the time they notice any physical changes, you'll be well on your way.
In the meantime, you can casually identify transphobic relatives by remarks they make when a Caitlyn Jenner news piece comes on.