About transual girlfriend?

i guys i just wanna ask you a question about transual women, i'm in love with this girl who is she extremely hot like a women it been three month we love each other and now we started living together in a same roof we never had till now , and now we want to perform but i'm afraid that her thing will hurt me , once she showed me her that was Hugh then mine, i don't know were to start i mean i have perform oral but when it come to penetrative i'm scared she told me that it's does not hurt but still, if any guy's who as experience this sort of situation please suggest what should i do.