Flat symbol looks like a lower case B, (= b).
Como La Flor first part:
Left hand rhythm: Beats 1 and 4
(Right hand rhythm: Beats 1 and 3)
Left hand (Right hand) fingering
Bb (D-F-Bb)125
Eb (Eb-G-Bb)135
F 2x (C-F-A)124
Try right hand rhythm on just beat 2 once you can do the other rhythm, them try 2 and 4.