Here’s an easy way to ad a 6th chord into your 2 - 5 - 1 chord progression, effectively making it a 2 - 5 - 1 - chord progression with a substitution.
When you are trying to learn jazz guitar one of the 1st concepts that you need to get to grips with is chord progressions, especially 2 5 1 progressions or 6 2 5 1 progressions.
It’s so important when play jazz guitar to outline the chords and the chord progressions, whether you are comping, soloing or improvising.
Have fun practicing your new 2 5 1 chord progression!