New to trap - anything I absolutely must know?

Title. Purchased a 12ga pump for general hunting/sporting uses and since the season is over in my state I was going to head over to a local sportsman’s club that has public trap shooting on weekends to get comfortable shooting and get some form of practice in with using and caring for my firearm. Plus, busting clays is fun. I have the right gear and ammo that they require for their fields. Other than telling them it’s my first time shooting trap formally - anything really important you think a newbie should be aware of?

Thanks y’all