It's tough.
Sometimes I say the Internet is where all the loners and marginalized people congregate.
I've also struggled to fit in, both in real life groups and Internet ones. There's many reasons for that: not quite adjusting to the group's beliefs, not being overtly social, struggling to understand implied/hidden rules, and of course, simply just not being "in tune" with the group's people.
It's kinda fun being an online wanderer, tho. Just passing by. Nothing that ties you down.
But we're social animals, so it's normal we crave true connection, as well.
If there's something you can take from me on this exchange, is this:
Don't give up.
It took me more than 25 years to finally find not one, but TWO groups where I truly feel at home. And 20 to find a soul I can truly be myself around him.
You will have to learn things. How to maneuver social situations. Be active, and present. You might stumble upon communities, but if you want to truly be part of them, you'll have to participate, regularly. Silence kills relationships. But remember, you can also rekindle them. That's the part I am learning nowadays.

Everything worth doing takes a while to learn, but you won't be bad at it forever.
Finding a group you truly belong in, or a person who truly understands you... that's one of the rarest and most special of life's treasures. And I know about rarity, I'm an unicorn after all

So treasure them when (when, not if) you find them, ok?