Look at Rule number 3  Continued...

Rule number 3

Finger Mechanics

  Here is a quick guide to some other basic chords that go together in a

  few Keys that you can try

You can also use the VI chord too, the relative minor shown below

(There are more chords than these but for this book we will keep it simple)

    Other  I – IV – V (One – Four – Five )  Chord Progressions