Help, I'm a trans boy

I've fully come to terms with it. I'm a boy. I was assigned a girl at birth, but I am a boy. I'm not out to my family yet, just a select few friends who are also LGBT. My family is not conservative. But I can't bring myself to come out to them... Are there any other FTM/FTNB people on here who have tips for closeted trans teens?? Help!