Now you have gone through learning the staff note names and where they are placed on the guitar, the next step should be to find some simple sheet music of your favorite songs and have a go at playing them. Try to start learning songs you know first so you can hear whether it sounds like the original song. Keep in mind that if you are learning the song from simplified sheet music, the song may have been changed to make it a little easier to play. This was a quick run through the notes on the staff and there are other books that go more in depth with reading music. So take the time and learn how to read sheet music, don't become one of the masses of guitarist that wouldn't know how to play the first note of their favorite song scored in sheet music.