To play shots off the glass, prepare early by turning sideways, use the glass to create time, wait for the ball to bounce off the wall(s), and adjust your feet based on the ball's pace and bounce before hitting.
This is really useful if you want to improve your technique for handling balls coming off the back and side walls in the corner. The coach emphasizes getting your body turned early and using the glass to give yourself enough time to prepare and react. Paying attention to your footwork and adjusting your position based on the ball's speed is key. They also stress the importance of patience and waiting for the ball.