To jam and learn the simple chords for Cactus - Shudhu Tumi Ele Na chords, practice playing F, G, Am, F, G, Em and Am in sequence. I suggest starting at a calm pace of 48 BPM, and as you gain confidence, approach the song's BPM of 97. To match your vocal range and chord inclination, adjust the capo in line with the key: D Minor.