Well the only people around me who know are my mother and my grandmother. My grandmother is the only family member I trust. My mother didn't take it well, as I expected. It went great the day I told her I was questioning my gender and all/most of the signs across my life, but later she seemed to change her mind...idk.
Part of it might be religion based. If so, I would look into scientific theories. Mention how it's even listed in the DSM-5 the modern book used for such diagnosis's. You could even make a strong argument that it's a birth defect caused by hormone imbalances as a fetus. Religious people are more accepting if they can have a some evidence that's it has medical backing. And yes, talk to a therapist. Even if they can't help you come out, people often accept things better if they know you talked to a professional.
Post Script: No offense meant. I know someone out there is mad that I said it could be a medical condition, or even discussed telling others it could be a birth defect. I am sure someone is offended. I wish it to be clear, I am only discussing ways to approach it so others might accept it better. My most sincere apology for any feelings hurt.