Most Internet Guides are lengthy. But you don't need to know every detail, certainly not right away. You need to know only how to use those parts of Internet you want to use.
Nobody knows all about the Internet.
Learn what you need to know when you need it, a little at a time. This guide is brief, designed to give you the little you need to know to get started. These pages will give you the basic terminology, concepts, and operations on which to build when you want to know more. Be very nice to these persons. They are very busy, but seem always eager to help you make full use of what their work has made available to you.