The Tildeverse is a bunch of shared UNIX or UNIX-like servers (in reality, all the ones I know of are Linux, which <sigh>), with individual user accounts, or "tildes" after the way you refer to a home directory in a URL or UNIX command line: ~name.
Anyone can sign up for one of these, tilde.town got back to me in a couple days over the holiday and I expect they're faster during reasonable times.
So over the holiday I made a simple little web page, then wrote some ASCII-art (and Emoji-art) games in Javascript, and now I've written an operator's manual for a fictional computer, the TTMS-76 (Tilde Town Microcomputer System '76). I'm thinking about making some 3D renders of it, patriotic colors to match the American Bicentennial in 1976. I'll probably mirror all this on mysticdungeon.club when I work out what I'm doing with that.
There's a bunch of little command-line utilities on tilde, like alpine for local mail, feels for blogging from text editor, botany for watering a plant, poem to get a random poem, chat for a friendly local-system IRC; there's also a public IRC on Tildeverse (but it's more what you'd expect from a public IRC, so you may not like that).
If you used to use a shared UNIX server, this will all be very familiar and fun. If you haven't, it's a great way to learn more about command-line tools, how shared hosting works, how to write HTML the old-fashioned way, and so on.