Oh, good to see another TPN fan. I hope it'll get more popular when the anime comes out, the fandom is bigger than it used to be but it's still relatively small. The series is so amazing, I have to catch up when I have the chance to.

Re: DCMK fandom - have you tried reddit? IIRC there was some pretty solid fanbase, and they had an official discord that was really active (to the point where I left because I couldn't keep up).