To start learning Ll Cool J - Doin It chords, delve into these chords sequence to get the song's feel: E, G, C, B, C, Bb, G and Bb. To master the tempo, it's wise to start at 47 BPM before aiming for the song's 94 BPM. With an eye on the song's key Db Major, set the capo that best suits your vocal range.