Ubuntu and Docker.
Really? Netplan alone disqualifies Ubuntu as a "friendly stable starter distro", and I can guarantee you that your guide will somehow become outdated with a single new Ubuntu release, or some poor soul who accidentally selected an LTS release.
Docker doesn't matter as much, but there's a reason beyond just FOSS licensing why podman exists.
Would highly recommend Debian instead.
I started on Ubuntu similar to this many years ago and both the server and desktop experience was not fun at all.