Learning step before Networking classes

Hello,
is there any resource to learn how toi install and maintain a network, from scratch?
Before talking about IP, subnet masks etc, I’d like to see an overview of how an installation may phisically works step by step, from an operator side view.
Suggestion?

A+ 220-1001 (Mike Meyers) Chapter 13

But my advice is just to get A+. And after that Network+