To learn 참깨와 솜사탕 - 속마음 chords, anchor your practice on these foundational sequence of chords - Dm, A, F#m, D, Bm, A, Bm and F. I suggest starting at a calm pace of 55 BPM, and as you gain confidence, approach the song's BPM of 110. Considering the song's key of D Major, position your capo to suit your vocal and chord preferences.