To learn Greeeen - Haruka chords, your first step should be understanding these chords - G, A, D, G, Bm, G, D, A, C#m, A, B, E and B in sequence. Kick off your practice at a gentle 41 BPM, then escalate to the song's tempo of 84 BPM. Fine-tune the capo based on your vocal range, ensuring it complements the key of D Major.