I'm trying to understand how to make a good serve and I find it quite tricky. I've read that you're supposed to use the key for acceleration if you want the most powerful serve. But what I find difficult is the aiming. Most of the time the bll bounces close to the middle of the opponents serve square. I've tried to aim left and right but then it either goes out or in the net. I want to be able to aim wide or close to the middle so I can have a variety.
Could someone describe and guide me through the serving process when and how you aim and when to let go of the keys?
Thanks.