I found !ttrpg.network (not sure how to link from kbin, but that’s what i search for) and it seems to have a lot of good, active communities. Other than that, I haven’t found anything more populated.
@EmpeRohr Off the Fediverse, dndbeyond.com and 5esrd.com are actually more than sufficient to get someone started. I do recommend trying to get either the starter or essential’s kit because you’ll also get the digital version on dndbeyond.
Welcome. The weather around here is pretty decent. Feel free to stick around for awhile.