I'm from the Pottawatomie tribe, but we're split into thirteen(?) bands, and my personal band doesn't have the most history anymore. The whole tribe has a lot, though. Just not my band.
Everyone here gave great advice. Groups are super hit or miss. It's so hard to get a good group going, and even harder to keep it going. My advice is to just keep a steady flow of new people coming in, if you can. It helps when others lose interest and leave, or ghost, if you have others...
I found it to actually be kind of normal on this site. It's part of the reason I made my own. I spent like a month trying to join rps that never left interest checks.