Wow..19 years old! You're so young!
Congratulations on your HRT! Everything wil be fine...
I started very late at 38, but I have noticed a lot of changes a lot in only one year.
If you want to know in what direction will your changes go, you better look to the body shape of the women in your family. After all, you've got the same genetic material.
Take a look at the pictures of your mother, sister, aunt...when they were your age, so you will have an idea.