Until now you have been working with 1 stroke, now you will use 2 strokes to reach the independence of your hands (it is important that you sing the subdivisions like Horacio does). Your right hand plays the Clave in the Wood Block, the left hand will play the Sixteenth notes. In this video you have an exercise with the 2nd and the 3rd Sixteenth note of the bar.
Second Note of groups of 2 notes. 1, 2, 3, 4… Then you have to keep going on the third note, fourth note, fifth, sixth, seventh, eighth nineth, tenth, until sixteen.