To learn 311 - Strangers chords, grasp the musical fabric of the song with this sequence - A, B, A, B, Bm, A, Bm and D of chords. A strategic approach would be to train at 48 BPM initially, and then accelerate to the song's tempo of 97. Considering your vocal pitch and chord choices, adjust the capo in accordance with the key: Gb Minor.