Learn arm swing techniques from Kevin Hambly, University of Illinois Women’s Head Volleyball Coach. He knows what it takes to win as his team was NCAA Runner-ups in 2011. See Coach Hambly progress his athletes into a quick attack drill emphasizing a 180 degree turn using the hips to generate torque and power through their core.
Here you can focus on the timing of the jump. Also, work on aiming to various spots on the court for better shot placement.