hi xeno, i am pre-hrt but when it comes to wearing a bra, i say go for it! even if you don't have anything there yet to put in them, you will shortly... might as well get used to them. start with a training bra just like teenage girls do.
many tgs here will tell you how after a while the thrill of wearing one will pass as you have to wear one everyday but that is the price of womanhood. i may be a minority but i have not gotten tired of wearing one. still as exciting as the first time.