I have a topic for which I could not find a matching community. I can see in the UI that it’s possible, and probably easy, to create a new community.
What happens next? Will I be up to my neck in mod work or other commitments/responsibilities? What aspects do I need to consider before doing this?
It’s just like creating a sub on Reddit. You will become responsible for setting up the sidebar, adding a banner if you want one, and setting and enforcing the rules. If it becomes a large community, you may find yourself up to your neck in mod work, but you can transfer ownership later, or bring in other moderators to help. If it stays small, you may have no work at all to do.