When you are young a few weeks feels like an age I know. When you get older it rushes by in a second. One thing which doesn't change is that life is a struggle for everyone.
You are doing everything you can. You are in the right place, and you have taken steps to get the best result that you can. Hormones do change the way you look and starting at 16 or 18 will produce the biggest and best possible result. Will you be pretty? I can't tell you that, in fact no one really can, because a fair bit of beauty is in the eye of the onlooker. If one person finds you attractive then, to them, you are pretty.
I know its horrible to be told to be patient, but really it is the only thing I can say. You WILL get there and, like me (I originally transitioned in childhood), you are starting out from a much better place than those who wait until they are in their 40's and 50's. So, like me, try to just be thankful that when we are old we will have had most of the right life.
Take comfort that you are not the first youngster to have to be delayed. When I was young the rule in the UK was that you had to be 21 before treatment and I was actually encouraged to de-transition for a few years whilst I was waiting so that I had "Properly tried adult life in my original gender before doing anything irreversible". I will leave it to you to imaging how confusing that felt! But I got through it, and in my early twenties I was back and on HRT, I made it through the wait and so can you.