To start learning James Moss - Psalm 150 chords, centre your learning around these elemetal chords sequence: Dbm, Ab, E, Abm, E, Bb, Dbm, Abm, Db, Abm and Ab. To master the tempo, it's wise to start at 56 BPM before aiming for the song's 112 BPM. Adjust the capo based on your vocal range and chord preference, keeping the song's key of Ab Minor in mind.
