To learn Robgz - 4Am chords, your first step should be understanding these chords - B, Ebm, E, Gb, E, Abm, E and Abm in sequence. For a smooth transition, initiate your practice at 81 BPM and gradually match the song's pace of 162 BPM. Adjust the capo based on your vocal range and chord preference, keeping the song's key of Ab Minor in mind.