Let your striking hand drop from behind the ball to back beyond your hips a little bit. (Elbow straight-closed fingers and heel facing the floor)
As you step forward with the opposite foot of the striking hand (Both elbows are still straight) bend your knees, lower the held ball and lean your head over the ball, bring your striking hand forward to meet the ball.
The heel of your hand and folded fingers strike just beside your pinkie. Don't let your foot go over the line or it is considered a foot fault.
Once you make contact with the ball, extend your legs up for power,and follow through!(follow through: continue your arm swing upward and point your striking hand in the direction of your intended target).