To learn L.E.J - Summer 2014 chords, your first step should be understanding these chords - Bb, Dm, C, Am, Bb, C, Bb and D in sequence. I suggest starting at a calm pace of 58 BPM, and as you gain confidence, approach the song's BPM of 117. Configure the capo to your vocal range and chord preference, remembering the key of D Major.