I once wanted to do this. I took classes, I bought equipment, I advertised for models.
I had this intense, consuming dream to photograph nude men. And nothing.
The fact of the matter is, if you're not good looking, you might as well not try. Good-looking models only trust other sexy, fit, good-looking men. No matter how shitty their work is. Me? I had guys walk away from me. I had guys tell me that they'd never be in the same room with my "creepy" ass.
My dream died a hard, angry, bitter death.