Maybe ask the moderators on the voices of the void subreddit, it would also promote this instance outside of lemmy.

It’s quite hard to do that as a lot of communities aren’t willing to put in the time of setting up a community on the fediverse. We tried to get a lot of indie game subreddits on board but so far it’s just silksong and balatro. Unless a bigger group of people on reddit ask for it then not much can happen

Just generally keep it somewhat indie-game themed (could be pixel art but doesn’t have to be, could also include characters from indie games etc.)