Setup Misskey Social Media on Ubuntu Linux | LearnFOSS — Self-hosting Courses
Misskey is a free and open project, and anyone can freely create a server (called an instance) using Misskey, so various instances have already been published on the Internet.
Also important is that Misskey implements a distributed communication protocol called ActivityPub , which allows you to interact with users of other instances no matter which instance you choose.
Because this is said to be decentralized, it is fundamentally different from other services such as Twitter, which are published by a single operator with a single URL.
The main topic themes, user groups, languages, etc. differ depending on the instance, and it is one of the pleasures to find an instance that suits you (of course, creating your own instance is also fun).