[META] Creating a new community is easy, but to get people on board, you need to create some content.
If you create a community, please try and populate it with content. I see a lot of new communities with 0-1 posts from the mod. That's not nearly enough to get people engaged - users are going to see that it's a ghost town and leave.
If you have enough interest to create a community, you probably know something about the subject matter, so PLEASE add some posts (5-10 would be a good start). Maybe some questions to get people talking, even popular reposts from other sites. It sucks shouting into a void, but if you don't do it, everyone else will also be shouting into a void.
Also please consider whether you need to create a community! When there are 100 million users of the site, there may be 1000 people who are interested in the same exact niche tabletop RPG as you, but there are <500,000 users here for now, so you'll be lucky to find 10. Consider creating a thread in a broader community (like boardgames) until you have enough people talking in the thread that it gets messy - then it's time to create a separate community.
Worth mentioning that if you have put in the work to have lots of posts, it might still show as very few, maybe 0–1 posts to people if they are viewing the community from another instance. Posts from other instances do not federate over to yours unless someone on your instance subscribed to it. And if all the users subscribing on your instance unsubscribe, then you will not get any more posts from it federating over until someone subscribes again. So a community that follows this advice can appear as if they did not put in the work when they really did. To get around this problem, view the community from the instance it is hosted on (e.g. view community@lemmy.zip on lemmy.zip, not through lemmy.world/c/community@lemmy.zip).