To learn 포맨 - (4MEN) 너 하나야 chords, your first step should be understanding these chords - Cm, G, Ab, Fm, Gb, Fm, Bbm, Ab, Eb, Ab and Fm in sequence. Begin your practice at a relaxed 63 BPM, then work your way up to the song's BPM of 126. Given the song's key of Db Major, adjust the capo to align with your vocal range and chord preference.