To start learning Lenka - Trouble Is A Friend chords, delve into these chords sequence to get the song's feel: Gm, Ab, Eb, Bb, Cm, Bb and Ab. A strategic approach would be to train at 59 BPM initially, and then accelerate to the song's tempo of 118. Fine-tune the capo based on your vocal range, ensuring it complements the key of Bb Major.