Over hand serve

To over hand serve first you gotta toss the ball, it's all in the toss if you don't have a good toss u probably won't have a very good serve. Toss the ball (if your right handed) with your left hand. Not big or too small just a toss that goes just above your head. Once you toss the ball, at the right time hit the ball with a big open hand and have your fingers spread. Try to hit the ball up and hard so that it goes over the net.