Watch the Approach 2: Breakdown online guitar lesson by Vicki Genfan from Rhythm Makeover: Vicki Genfan
Just as a note: the Em chord form here is actually a beautiful GMaj7 with an added 13(open 1st string - E) and 9 (2nd string - A) if we use the 5th string as our root. These voicings may be new for you, and if they are, don’t be in a hurry! Give yourself plenty of time practicing each change very slowly until your fingers get familiar with the new shapes. If you rush this process, you’ll never get a smooth transition between the chords. Another good trick to use when learning challenging chords is to leave the chord before the change just a second early - to give yourself more time to land on the difficult chord in time.