You can already, with plebbit-cli: https://github.com/plebbit/plebbit-cli
You can also use the desktop version of seedit (on https://github.com/plebbit/seedit/releases/latest under "assets", available for mac/win/linux) but the cli via web UI should be much more performant. You can see the seedit web UI link in the plebbit daemon logs from the CLI. Soon we'll have docs that will explain everything in detail, with screenshots, on https://plebbit.github.io/docs/
Also once you create your community, if you keep high uptime we can add it to our default list, so all our users will be subscribed to your community by default. Just dm us the subplebbit address on tg, or open a pull request on https://github.com/plebbit/temporary-default-subplebbits