This video was suggested by John Croes as a valuable source of information if you are intent on using coaching and drills to improve your game.
The Pickleball Channel- free- is a good source of coaching material.
One part of the PB Channel is Pickleball 411. This is a series of YouTube videos on improving your game and is done in a video format. To see all available videos, just do a Google search on Pickleball 411.
Here’s one of the videos