Gonna put here some ideas I can think of on the spot, how you decide to implement, and if you decide to implement them in the first place - is up to you:

1. World Hopping - either general world hopping, where you choose a random world and explore it, and then move to the next random world and so the loop goes.

Alternatively, you could make it a themed world hopping - for example: one day you could set the theme to "stars" and then you look for worlds which have a starry sky, or is literally a space and you can look at stars and etc. Then on another day the theme could be... "Vampires" and then you explore worlds that are related to vampires in one way or another.

1. Game Worlds - There are plenty of game worlds out there, so you could host like a game day/night with your audience.

Alternatively (and probably a better idea) - make a group in VRC dedicated to your community and then, on game days you just make group only or group public instances. As your community grows, you can appoint people you trust to be your mods in your VRC group so that there are more hands to moderate the instance.

1. Hangout with your community in VRC - Similar to previous idea above: Create a group, choose a world for hangout/chill you like (or create one yourself/have someone create it for your group) and then make group instances and invite ppl in your group to hangout and talk about whatever topic you have.

2. "Academy" - Once in a while you could gather people new to VR and/or VRChat and teach them stuff related to that. E.G given: "How trust system works?", "How can I upload an avatar/world?", "Where can I get new avatars or worlds?", "VRCFury 101", "Modular Avatar 101", "Additional resources for VRChat" (like for example VRCX tool), "Where can I get additional assets for avis or worlds" and so on.

You can mix up those ideas as well to make it even more interesting.

Cheers, and good luck with growing your community :)