Hello Supergirl
I'm an old member here, and I recently rejoined to offer a bit of insight from time to time.
I'm going to take a different approach to the other respondees: take your hormones and then forget that you're even looking for changes from them. Hormones are a lottery, and you never know how much of anything you're going to get!
The true changes are the ones you're probably going to have to make yourself - through strong personal effort. Changing your voice is one of them - give it time; practise a lot; record yourself and listen to how you speak; take your voice out with your friends - and work at it for at least 6 months, even if it's exhausting. And similarly for the other things that are needed to become a girl - mannerisms, body posture, your use of personal space, choosing and implementing a style of dress and presentation that will work to your best advantage etc. These are the things that are much more likely to make you into a credible girl. (If you want breasts right now, get a padded bra, and if you want long hair get a good wig and take a family member with you for their opinion)
I hope this makes sense. Good luck!
xxx
Julia