A PC with Ubuntu Desktop installed (not Ubuntu Server

Any reason why not use Server when setting up a home server?

It walks you through setting up SSH with keys and then git entirely via the command line. Maybe they plan on writing more?

That's what I was thinking, but I wasn't sure. I figured I'd ask op, since the post seems to be theirs.

As I'm writing this, I'm thinking maybe it's because Server is generally cli-first, and this post is geared towards a more noob audience, so they're going gui-first? If so, I appreciate the forethought.

Then do something like Fedora Server, which gives you a web GUI after a guided graphical setup. More user-friendly than ssh and managing everything through the terminal (though you can certainly still do that)

Unless you wanna run headless and do everything via SSH then desktop is better, its essentially identical to server, but with a GUI and some apps bundled by default - both of which new users and infrequent server admins generally need.