To start learning Buck Owens & His Buckaroos - Mexican Polka chords, delve into these chords sequence to get the song's feel: E, D, E, A, E, D and A. To master the tempo, it's wise to start at 66 BPM before aiming for the song's 133 BPM. Fine-tune the capo based on your vocal range, ensuring it complements the key of A Major.