There is no "girl" clothes,but if you wanna be more feminine,you can start wearing crop tops and maybe,if you feel comfortable enough,skirts!You can have fun with the way to present yourself and your style.Also makeup helps confidence sooooo much :)
Sure,it must make you nervous but maybe start wearing them only in front of your friends?A friend always steals me old clothes because she's mtf but closeted so if you're the same size as a female friend this is an hack:) also,feel free to memechat me if you want