James - For electrical, I think the best method to learn is visually seeing it. I have an electrician friend that let me spend a few days working with him for free on the account that he would answer questions and also grill me on techniques, reasoning for “why” something was done. In exchange, he got free labor and I wrapped my head fully around the concepts of what should be critical for an inspection.
Another resource (I have no affiliation with this) - on youtube, there is a guy named Ben Sahlstrom who has a channel. He does a very good job of putting it all together in an informative way and if he had a Patreon account, I owe him some money. I have confirmed many concepts and practices from watching his stuff. It is not all electrical based, but primarily is. He is young, and was taught well by someone. Just food for thought. The more you can get around it, the better. Electrical was the main area that I did not book learn well.