We all, with few exceptions, miss out on much of the life we should have had, and the life we're given to replace it seems more like a sentence than a consolation prize. I think this is true even for those, like me, who had no idea that they were trans growing up. (I speak in generalities I'm sure some will take exception to.) The only shining light I've seen is that we seem to keep our youth just a little longer than cis people, perhaps because our hormones are administered and we don't HAVE to go through menopause or it's male equivalent. It's not much, and it certainly doesn't make up for what school should have been, but it's something. If you're in the US you'll be an adult at 18. Prepare as best you can, save money, learn, make contacts, so that you can transition just as soon as possible. Take some solace in the fact that women come in all shapes and sizes and that testosterone doesn't complete it's work until about 26.