@Ron I’ve actually seen some iterations of them before in other contexts, and they’re great for beginners. They go beyond some of the basic website things and into other things one can accomplish with a domain name. Some of them are WordPress specific, but others aren’t.

As for Manton’s book, I’ll say that he has been busy with a few other things, but I’ve also seen several portions of his book in private settings. I’m impressed with how much detail and care he goes into the history and even technical portions that I really didn’t expect from his original descriptions.

In addition to the linked resource and the IndieWeb wiki, you might find some value in Reclaim Hosting’s Newbie Corner: community.reclaimhosting.com/c/newbies… and the rest of their community forums which cover a broad variety of CMSes and other self-hostable web apps. Good luck!