I tried coming out at 18. It didn't go so well. I told my best friend... who then never spoke to me again. It was embarrassing, we were doing the same training scheme and would bump into each other. He completely ignored me.
I was glad when that year was over, I went off to university and never saw him again. I do wonder about him sometimes, and did a little digging. He appears to have completely vanished.
After that, in my first year at uni I had an awful experience and nailed the closet door shut until I was 26.
I had a seizure that was... misunderstood by the people I was with and my own escape was to clam up completely about it for some years.
I did eventually talk to a therapist who gave me a good explanation, it just took some time.
I'm transmasc and questionning if I'm gay or pan, leaning more on gay.
I came out as trans earlier this year and it hurt my mom quite a bit. She didn't take it badly, but I was always her little girl, so it took some time for her to adapt and properly accept it. My dad doesn't really know or care, that's on him, idc either. My granny is super cool and asks me a ton of questions on the process (I'm on T since May and looking into top surgery). Rest of my family took it ok, they don't seem to care much lol.
My friends are LGBTQ+ themselves and extremely supportive.
As for the gay thing, there isn't really any "coming out" required, but I always like men, even when I presented as female.