If your technique is lacking, doing as many reps as you can in a limited period of time will NOT sharpen it.
If you can't squat properly with bodyweight, then using a loaded barbell with the movement isn't a good idea.
If you can't rack a barbell for a front squat, then you probably shouldn't be doing cleans... at all.
If you are very overweight and your trainer suggests sprinting and plyos (also known as plyometrics), you need a new trainer.
Chuck needs to learn to rack the weight first...