Starting T and surgeries do help a lot at gender/sex features like facial masculinity, voice, hair, fat redistribution etc. Something you can consider when you're old enough. Perhaps you should seek help from a gender therapist how to cope with the gender dysphoria. When you turn adult, you can start T at your own and your parents can't decide over you. But if you're not adult yet, parents has a lot to say.
When it comes to breasts, maybe you can consider getting a binder or a sports thing. I have no idea which one that is good, since I have never tried one. Have you tried hoodies, big pants etc? They might not work in summer time, but when it's not too warm outside, perhaps it might work out. It's not so easy for me to say, because I have no exactly picture of how you looks like.
You can't do so much with your face pre-T, to be honest. But your haircut would affect a bit. I recommend you shorter hair at the sides, and a bit longer at the top. You should get a haircut that is more squared/straight cuts than roundish haircut. Guys haves often a straight line at their side burn and neckline. But girls have rounder or more pointy ones. Thick and dark eyebrows are also recommended.
I have no idea how you can boost natural T level. Is that possible? When it comes to misgendering, it would be something you have to cope with. Most trans people have to. After social and medical transistion, it might improve a bit. It's easier to get lesser misgendered, when you get older. Because people takes you more seriously then. Things gets easier when you gets older. Often the teenage and childhood are a difficult part of the life. It would soon go over. By the way, every human beings comes in difference shapes and colors. There aren't any A4 limit at peoples, everybody are unique. Nobody can define you, because you know yourself best.
