Hi, I am a 16 year old trans* man, so I understand how you feel. It is pretty bad here in Australia, if you are under 18 you have to get a court order for puberty blockers or HRT, and I fully get the whole proof thing.
I know a 17 year old trans* woman who is 6 ft tall. I also know that 6 ft and skinny is a common build for models. I know being really tall can make it harder to pass, but it isn't the end of the world, and could really work in your favour when you have been on hormones for a while and look more feminine. Your bones won't change. It is awful. I wish I could give you my horrendously wide hips, and have yours but the world doesn't work like that unfortunately. Also, if there is any possibility of you getting taller, estrogen will stop that happening, although unfortunately it doesn't change your stature unless you take it during your first puberty.
Your body will, however, get much more feminine. Your bones won't change but you will start storing fat on your hips, you will develop breasts to some degree, and your shoulders will get less broad (again, within the restraints of your bone structure). You will lose a lot of muscle definition, and some mass as well, which will make you look more feminine and fat redistribution will also contribute a lot to the feminization of your face (yes your cheeks will become fuller and your features appear less angular).
You may or may not end up needing the tracheal shaving, the FFS, or the rhinoplasty, but you have to wait at least 2 years or so after starting hormones to tell if you really need it.
Hormones will reduce your amount of hair, however, depending on how hairy you are now, you will probably still need some amount of electrolysis. Probably the most important things besides hormones for passing, are your voice and hair. These are also things that can be addressed relatively early on. Start saving money for electrolysis if you don't have much, as it can be expensive. Also, depending on how much money you have / your personal preferences, there are some different things you can do about your voice. You can look on the internet for videos about "mtf voice training" and there are heaps of resources and videos on that there. If you have more cash, a better way is to see a voice coach, and they will help you. There is surgery for raising the pitch of your voice, but opinions are very divided on that.
I know waiting and proving your identity sucks, but it is well worth it because the earlier you start hormones the more effective the treatment is.
Good luck