Quit now while you are ahead. If only Id' have quit at 17 instead of 23.......but then I picked it back up at 54!
Seriously, What gun were you using? Choke? Shells? Eye dominance? I will assume 16 yards if it was your first time.
So here's the basic advice: Find the best shooter at the club. (watch the league shoots and look at the stats, it'll be obvious who shoots well) Introduce yourself, tell them you're new to Trapshooting, and ask if they would watch you shoot a round and offer some tips. as mikkeeh said, you don't aim a shotgun at moving targets, you point it. If you can visualize what is happening when a clay pigeon is hit, you will understand. The shot is coming out in a cloud (some prefer the term string) it is about 30 inches in diameter at 40 yards the long end of when most people hit them. That cloud should intercept the clay pigeon when the clay is in the middle of the cloud. To do this, your mind and body work together, the more subconsciously the better, to point the shotgun where it needs to be when you pull the trigger.
Watch this up until at least 18:00, a bit longer if you're left handed:
It's old, but the basics are still the same.
This guy, if you can decipher his accent is also good to watch:
He does Sporting Clays, Skeet, International, etc. also, but his Trap videos are very good.