To jam and learn the simple chords for Hamayun Khan - Attan chords, practice playing Ab, Fm, Gm, Bb, Ab, Bb, Gm and Ab in sequence. A strategic approach would be to train at 64 BPM initially, and then accelerate to the song's tempo of 128. Given the song's key of Bb Major, adjust the capo to align with your vocal range and chord preference.