The first step is to stand outside the D of the rink on which you are looking to perform the layup.
Now you should be looking to make a rough estimate on the numbers of step that you need before going into the air after taking the jump for the layup
Now you have to ask your trainer to throw you the ball in your hands. The ball can be thrown in two ways. One is to be thrown straight into your hands while the other option is that the ball is to be given to you after a bounce and is taken after that bounce on the court.
After the catch, you will be required to dribble the ball on the court and these dribbles must be made while running towards the basket loop. After one or two dribbles, you have to make the jump towards the rim of the basket.
Now when you are at the top of your jump, you have to outstretch your arm that holds the basketball and lave the ball in the direction of the basket so that the ball drops into it.