The problem is, that i read the first few pages of it, and i really understand dink of it.
Well, since it is one of the simplist, clearest explanations of how to make beer, then until you can master the basic understanding then you won't really be able to figure out what you need to try to find to use...
Try this first, then go back and read what you confused by.
https://www.homebrewtalk.com/1080718-post1.html
This has pictures as well...
All Centennial IPA - Step by Step: How to make an extract beer « Homebrew Japan