If you're fairly comfortable with doing technical stuff on your own server, and you want to set up your own Fediverse instances, try taking a look at @yunohost which can be downloaded from:
YunoHost is a special version of Linux which makes installation of server apps and server administration much easier.
YunoHost currently includes support for installing these Fediverse platforms:
FriendicaGlitch-SocMobilizonPeerTubePixelFedWordPressWriteFreely
There are also lots of non-Fediverse apps available, see https://yunohost.org/en/apps for a complete list.