For voice, you have to train, there's no going around it. It's hard, not that hard, but it will take some effort, and consistent training (I can link a few resources I got from other users, if you'd like).

Changes from E will take time, unfortunately. But the way you dress and take care of yourself is just as important. If you dress with masc clothes, speak with a more masc voice, have a masc haircut, don't deal with facial hair in some way, most people won't register anything other than "men" and will not even think about it, hell, even other trans people won't realize.

I'm not sure why you are so focused on the T puberty, probably the majority of trans women have gone through it and they can just look like a woman too (I know a few stunningly beautiful ones). E will help, obviously. But you can also do other stuff to help, like change how you dress, learn how to do make-up, do skin-care, shave, paint your nails, do your eyebrows, and many many more things you can do. If that's not something you can do right now, then yeah, it is going to be harder to get treated as a woman by a random person, or someone you haven't come out to.

If the size thing is about height, there isn't that much to do besides accept that tall women are beautiful. If this is about weight and fat distribution, then the only thing I can recommend other than realizing women with bellies are beautiful, is to exercise and eat healthy. That way losing weight and redistributing fat from E will get you closer to what you want.

If there is some specific way you want to look like, it might be harder to get there, but I'm sure you can look how you want to. Remember, you are already a beautiful woman, the other people just haven't realized it yet.