Help with playing offside

I'm continuously getting caught trying to play offside at the moment. I'm down conference north so my defenders are poor but I really want to develop a tactic that plays a high line and shuts down aggressively when off the ball. I'm hoping somebody can help when it comes to training this as my defenders are not working as a unit. Im guessing I need teamwork, positioning, concentration, maybe anticipation but I seem unable to train any of these stats.

Also the fact that you're playing at such a low level means that your players won't have the mental attributes to pull off a good offside trap. They won't have the recovery speed either if anyone gets past. Wait until you're higher up the divisions to try that