I have a Mini-PC sitting under my TV that is a frankenstein’d together media PC and home server running on Ubuntu.
I am running Nextcloud for easily accessing stuff from all devices, Bookstack for organizing and sharing notes, borgbackup for, well, backups. Currently experimenting with gitea just in case github loses its shit^^
Industrial Revolution 3 - it provides a very different experience and more depth while not blowing the complexity completely out of proportion. Industrial Revolution 2 is also still fun, and may be preferable if the addition of more complexity in the oil processing that 3 did is not your thing.