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.
First time I tried was in middle school. She was disgusted and outed me to the whole school (conservative south). Eventually my parents found out and it went alright, I mostly denied everything.
I also nailed shut the closet door until college when I finally accepted/discovered again my queerness.
Came out again as bi and non-binary a few years ago, have tons of supportive (and trans) friends, my partner is amazing. My parents kinda try but I don’t bother too much anymore. I’m not really “out” at work other than being generally queer looking.
Overall pretty traumatic but I’m in a much better place now, gotta look at the bright side.