Let's start jamming Eric Chou - When We Were Young chords, familiarize yourself with these chords - F, Eb, Bb, F, Bb, Gm and Bb in sequence. Set your pace at 67 BPM initially and then sync up with the song's BPM of 135. With Bb Minor as the song's key, tweak the capo to cater to your vocal pitch and chord likes.