I bought the Kindle version of "Elektro-Installationen im Haus" by Bo Hanus. It is not technically very precise, but explains in simple ways how to connect individual things. He also rightly says that it basically does not require great craft skills, as the cables are screwed together with ready-made parts and there are few machining tasks (work steps where you work on material with tools). You only need a handful of good tools (don't be too stingy) and the fun can start.
However, I would not trust myself with a complete house installation. Certain things are only allowed to be done by the "master" (e.g., to sign the form for the supplier).
For example, you could do the network installation yourself. There is no real voltage on it and it is not connected to the normal power grid. If you are doing that, you could also lay satellite, cables, etc. When buying the parts, you will realize that the savings are much smaller than you think. As a private person, many parts are really expensive and you need everything – including tools.