Too afraid to come out

I'm not sure why, but I'm too afraid to come out. I know my family would be supportive, my parents, cousins, aunts, uncles, they would all support me. My friends would also all support me and I don't live in an area where there's really all that much discrimination. I don't understand why I find it too scary to actually come out.. It might be because I'm thinking of the "what ifs" or even the fact that I'm 15, and too young to start HRT legally. I just wanted to write about this instead of getting it off my chest to the couple of friends I've come out to, and was also wondering if there was anyone else afraid of coming out for seemingly no reason, and what I can do to get over my fear in the future.

Anyway, that's about it, thanks for reading! x3