After years of it being on my todo lists I've finally:
* Setup a minimal nextcloud install (as a VM running on Proxmox) .
* Exported my calendars and contacts from google.
* Imported them into nextcloud and cleaned them up a bit.
* Setup vdirsyncer / khal so I can view/edit calendar events in a TUI as (1970s) god intended.
Nice to have more of my important life information in a tmux session and also, more importantly, out of the hands of google.