SerenityMC is a multi-server bungee community with low latency and steady TPS, so the different worlds stay smooth for players. If you want to build, fight, or just hop around between game modes, there's a bit of everything here without making it feel cluttered.
The network includes a build server, a PvP world, and a Pocket world for non-Java players. Java players can join through the main address, and Bedrock players can use the Pocket world with the extra port. If you run into trouble registering an email, there's also a contact listed for help.
It's a pretty straightforward community setup with PvE, minigames, parkour, economy, and building all tied together under the same network. Good if you want something a little more varied than a single-world server, but still easy to jump into.