Let's start jamming 小阿七 - 从前说 chords, practice the chord sequence A, E, B, C#m, E, F#m, B and E. I suggest starting at a calm pace of 58 BPM, and as you gain confidence, approach the song's BPM of 116. To match your vocal range and chord inclination, adjust the capo in line with the key: E Major.