To jam and learn Mary Wells - (Single Version) My Guy chords, your primary focus should be mastering these chords sequence: D, Dm, Bb, D, F, Dm, Bb and Gm. Begin your practice at a relaxed 63 BPM, then work your way up to the song's BPM of 127. Adjust the capo based on your vocal range and chord preference, keeping the song's key of G Minor in mind.