For beginners. Useful information from books.

From the book "Practical Methods for Reading Electrical Circuits":

What is a schema and what you need to know for reading schemas

Causes of errors in electrical circuits

Hidden errors in the schemes. False chains. Principal provisions

From the book "How to read general-purpose electrical installations":

Types and types of circuits and their purpose

From the book "How to make a small electrical installation project":

General information about the design and its tasks

Features of the implementation of small electrical installations