I have my tiny instance that currently has 4 users, with me being the most active. I update Lemmy regularly, upgrade and manage resources as needed, and even do server management via my phone when I need to. Federated with all of the big ones so there’s no lack in content and I’m always scouring for new communities to sub to. The only rule I have (aside from the ones stated in the rules page) is no NSFW. It’s mostly a CYA measure for myself.