To start learning 許冠傑 - 斷腸夢 chords, delve into these chords sequence to get the song's feel: Dm, C, F, A, Dm, Bb, C, Am, Dm, Bb and B. Start with a comfortable 43 BPM and as you become proficient, aim for the song's BPM of 88. Given the song's key of D Minor, adjust the capo to align with your vocal range and chord preference.