Well, this is kind of a hard thing to do. Even if you dont rlly speak or are talkative, i do reccomend going to lgbtqia+ bars, just being there will probably get ppl to associate you w the scene.
If you are younger (didn't check), i'd say your best bet would be to try and find local groups, communities, both online or irl. Even frequenting alt spaces that are commonly full of alt and/or queer ppl is a good way to get to know some ppl; just be yourself, and those who are alike to you or simply liked you will eventually go to you, or you to them.
If that doesn't work out, being upfront w it might be your next best bet, maybe start light (wear a pride pin, a bracelet, whatevs) or just go and ask them, spark up a conversation!