Let's start jamming Kim Jun Suck - (Main Theme of W) W chords, Practice these chords sequence - Abm, E, Abm, E, Db, Abm, Db, E, Ab and E. A strategic approach would be to train at 75 BPM initially, and then accelerate to the song's tempo of 150. With Ab Minor as the song's key, tweak the capo to cater to your vocal pitch and chord likes.