Player 1 starts by standing on a bench, while his/her partner throws the ball up and volleys it in their direction.
Player 1 then jumps off the bench and digs the ball back to their partner, who catches the ball and starts the process again.
New hitters rarely miss because of their arm. They miss because of their feet. Build a reliable approach, then time it with your setter.
When your hitter gets stuffed, five teammates standing and watching is how you lose the point. Good attack coverage turns a blocked ball into a second swing.
Coaches spend hours correcting arms in serve receive when the real fault is almost always the feet. Fix the movement and the platform fixes itself.