Before we get to the right swing, let’s go over how the racquet should be gripped. If you have the wrong grip your swing maybe perfect but your shots will be horrible.
The grip is easy. Put the racquet between your first finger and thumb. Move the racquet so that it leans on your first finger. You should now be able to shake hands with the racquet. The position is as if you were shaking hands with someone but instead of giving you their hand they gave you the handle of the racquet.
Locate the V between your first finger and thumb. (If you look at the back of your hand the first finger to the thumb looks like a V.) The V will either be on the right or left of the ridge of the racquetball handle. It will depend upon whether you are hitting a forehand or backhand.
If you are hitting a forehand the V will be on the right ridge (left if you are left handed.) If you are hitting a backhand then the V will be on the left ridge. (Right if you are left handed.)
You may have guessed it but if you didn’t, you will have to change the grips depending on whether you are hitting a backhand or forehand. The thumb is used primarily to change the grip. You will probably want to practice by walking with a racquet and changing the grips from the backhand to forehand.
Now there is a harder grip which is call the Continental grip. The V would be in the middle. With the continental grip you do not have to change grips for the backhand or forehand.