To learn Madman - Chillin chords, grasp the musical fabric of the song with this sequence - Gm, Dm, C, Dm, C, Gm, G, Eb and Cm of chords. I suggest starting at a calm pace of 42 BPM, and as you gain confidence, approach the song's BPM of 84. Configure the capo to your vocal range and chord preference, remembering the key of Bb Major.