To learn Dean Martin - Mimi chords, your first step should be understanding these chords - Am, D, Bm, Em, Am, Bm, Am, C and D in sequence. Kick off your practice at a gentle 64 BPM, then escalate to the song's tempo of 129 BPM. Align the capo with your vocal depth and chord choice, bearing in mind the song's original key: D Major.
