The most straight forward I see appears to be Docker hosting

https://github.com/revoltchat/self-hosted

https://developers.revolt.chat/faq.html#admonition-what-can-i-do-with-revolt-and-how-do-i-self-host

If you’re looking to self host but are uncomfortable with Docker I recommend checking out YunoHost as an option for something a bit simpler, they also support Revolt

If you’re worried about Kagi’s connections, I recommend checking out this podcast with the CEO