NixOS and Restic are an amazing combination, full backups in 20 lines of config. This article was my best find for this: https://francis.begyn.be/blog/nixos-restic-backups . Tip: you can easily write systemd services to trigger each software's preferred backup strategy and simply schedule them to run before the Restic backup - I have them all copy the backups to one folder that then Restic backs up, works great for me!
Hope this helps a bit. I found the effort to be very worth it, but took me almost half a year to get comfortable with it.
I went this route from the start and love it. In case you need some resources:
Hope this helps a bit. I found the effort to be very worth it, but took me almost half a year to get comfortable with it.