Try doing research on passing tips- I don't really know despite being a trans girl for over a year loll, but what I do know, attempt talking in a deeper voice from time to time. Start by little increments and gradually make it deeper and deeper. Like someone else said- try baggy clothes. Mainly like male athletic gym shorts and a t-shirt. That can be difficult if you don't have a binder, but its all about you, so good luck duddee! If you need me, I can give you my imgflip chat thing