yaakov doe: Do not learn to be a mohel if you want to rely on that for your parnassah. Halachically, a mohel is not allowed to charge to perform a bris. Some use a loophole that they check the baby after the bris to be sure it is healing properly.
I used R’ Rami Cohen as the mohel for my son. He refused to take a penny. When I asked him if he had a tzedakah he prefers, he said “Yes, and I give to them. If you want to donate money that you’d planned on giving me, you can choose your own tzedaka!”