To jam and learn 梦墨 - 梦未还 chords, your primary focus should be mastering these chords sequence: D, Em, C, D, G, D, G, Em, Bm and C. Set your pace at 76 BPM initially and then sync up with the song's BPM of 152. Set the capo considering your vocal range and favored chords, aligned with the key: G Major.