To start learning Taeyeon - I Do chords, delve into these chords sequence to get the song's feel: F#, B, G#m, C#m, F#, B, F#, C#m and B. Begin your practice at a relaxed 38 BPM, then work your way up to the song's BPM of 76. For a balanced pitch, adjust the capo with respect to your voice and the song's key: B Major.