Difficult. Socially: Nowadays I don't really feel like I am part of a LGBT "community". But that is probably because here in NL nobody raises an eyebrow anymore about same sex relationships, marriages or gay couples having kids. It's all very "normal" (if I may call it that). Sure, there are exceptions but overall gays are not different from straights in public or in society. Politicians won't dare to make any insulting remarks. They would be slammed in the press and on social media and it would be political suicide. Even the Christian parties in parliament (except for one very small one ) won't dare, they just say they don't really 'approve'. Nobody listens to religious people anymore anyway, hardly anyone goes to church anymore. Religion only plays a very tiny role in society over here.
It was very different when I started out when I was 17 late 70s and moved to the big city to study. I had crushes on teachers even in elementary school but at that age I didn't even realize what that was. I just thought I liked them. It wasn't until high school that I realized I was different from most and felt left out. Surely I was the only one having indecent thoughts about other guys? There must have been others but I didn't know them. When I was 13/14 I started to realize there were others and that there was a name for it: gay (or 'homo' at that time). And there were lots of them in bigger cities far away. So when I moved to the big city for college at 16 - soon to be 17- and I worked up the courage to go to a 'gay' student bar (drinking age at that time was 16, it's 18 now) I felt overwhelmed. Here were boys/guys dancing and flirting with each other and just having a good time with not a scare in the world. There were parties and discussion and social groups and support organizations. That's the first time when I felt I was part of a "community" and I belonged to something. And it felt very good. All this has changed over the years as it has become common now.
As for sex: Only took very little time after going to that bar for the first time (and having discovered the cruising area by word of mouth) that I sucked dick and was fucked for the first time in an AVS. And scored tricks in bars or clubs with whoever thought I was hot (looking for confirmation?) or hot for that night or who thought I had a hot ass and was 'easy'.... And I was 'new meat' so there were plenty of them, whether they were my age or old (i.e. anyone >30 at that time). And I loved being part of the "community" of men that simply liked having sex with other men without any hang ups. Hanging out with friends (who you were not going to sleep with!) guessing who would be going home with whom and tease them about that the next time. And them teasing me too of course ("really!! Him? How could you! Was he any good? What's his dick like?). Haven't stopped having sex with strangers since.
Considering the number of gay men is so much smaller than the number of straight men I still feel I am part of a 'group' but I don't feel I am part of a "community" anymore. Maybe I would still feel that way when I would be a regular at a certain bar and you know the other regulars there (not necessarily have sex with them, just 'friends') but there aren't any around where I live now.
Long reply but I hope this make sense?