When changing from one chord to another, you will often find that one or more notes are common to both chords. This means that the left hand fingers holding down these notes can remain in position for both chords.
For example, when changing between Dm and G7, the first finger does not move. The note played by the first finger (an F note) is common to both chords. The other fingers move to their new position and the first finger acts as a pivot around which the other fingers move.
The use of pivot fingers will make chord changes easier.
Playing chords is excellent practice for your left hand. It also gives you something in common with guitarists who play other styles of music and makes it easier if you wish to play other styles yourself.
Here are some more ways of playing chord progressions. Experiment with other ways of playing these progressions, as well as trying other chords with these right hand patterns.
This one contains mainly minor chords and is in the key of A minor. Minor keys are dealt with in lesson 17.