To learn 大貫妙子 - くすりをたくさん chords, your first step should be understanding these chords - D, C, G, C, Am and C in sequence. I suggest starting at a calm pace of 46 BPM, and as you gain confidence, approach the song's BPM of 92. With an eye on the song's key C Major, set the capo that best suits your vocal range.