I've learned by trial and error over a few years!
A lot of reading on the backend and the design was not overnight results either.
This version as I've mentioned is the "snap" install, not the version supplied by Alex. I can and have used that version for many years but last year changed to this version for my reasons.
It is a simple procedure, to be honest, and I think that is why the documentation is vague.
I'm able to help some members if the install is fresh, no matter what flavor you go with.