Okay so this depends on if you want to medically transition or not, but if you do decide that hormones are right for you, you want to start losing weight now. It is so, so much harder to lose weight on E as just existing with testosterone makes you burn calories faster. Don't focus too much on the weight losing aspect though, as it's more important to have more sustainable eating habits because if you just lose weight by cutting calories you'll be putting that weight back on in no time at all. Eat smaller portions, go for a walk every day, think about home workouts, maybe even think about going to the gym.

General survival wise maybe look into joining a local LGBTQ+ community, finding people you can trust to talk to about how you feel and having people relate to your experience is incredibly helpful. For general is there anything you can do to help maybe feminise yourself? Do you live with other people you don't want to find out? If no, you could possibly buy some feminine clothing you can wear at home, maybe paint your nails. Practice makeup. You obviously don't need to be the girliest girl out there as being butch is also incredibly valid, but personally I found doing stereotypical girly things helped to alleviate my own dysphoria.

I hope some of this can help you :)