You have a few things going for you: youth (HRT works best), an already pretty feminine physic, and beautiful face.
Depending on the hormonal regime and dosing, you could start feeling your breast tingle and become sore and sensitive within a few days or weeks. In my case, it did happen within 2 weeks, now, 8 month later I am between and A and B cup.
Other changes: more hair in my head, less body hair(I did not have much to begging with), softer skin, less muscle, I lost an inch in height. I am developing a female pouch under my belly button, and my hips have grown. Brain wise: more bitchy, more emotional, dislikes fighting sports ( I used to like it), carbs addiction, no erections what so ever. Still attracted to girls, but have develop a sort of interest in the boys
I think you are going to be gorgeous in eight months.
Good luck,
Peky
PS BTW I am in my fifties