To learn Bl4Ir - Sola chords, your practice should emphasize these chord progressions: Ab, Fm, Bbm, Fm, F, Bbm, Fm and Bb. To master the tempo, it's wise to start at 72 BPM before aiming for the song's 144 BPM. Fine-tune the capo based on your vocal range, ensuring it complements the key of Db Major.