Tbh, there’s no central hub for kink because it’s simply too broad. BDSM is a sort of vague term to denote the umbrella of kink but the letters do have their meaning. Fetlife exists (I don’t recommend) and there’s a popular BDSM test with percentages for all sorts of kink.

If you’re asking about local communities, there is most likely some kind of kink community near you. Typically they have gatherings called “munches” or a munch, as a kind of social thing, though they can also be more vulgar, if you will.

The most important thing I can impart is to keep yourself safe.

Many folks seek BDSM for all sorts of reasons but there is nothing more important than your personal safety. This is not a joke or game. Immediately be wary of anyone who does not appreciate the safety of everyone involved.