To jam and learn Nickelback - Hangnail chords, your primary focus should be mastering these chords sequence: B, D, E, B, A, B, A, D and A. I suggest starting at a calm pace of 86 BPM, and as you gain confidence, approach the song's BPM of 172. Given the song's key of A Major, adjust the capo to align with your vocal range and chord preference.