I'll agree with Twisted, don't look at sporting clays. They may tout "real world" shots, but some of the stuff I've seen I might not even shoulder the gun if it were a real bird. A friend got me to shoot quite a bit a few years ago. It's a challenge, but that's about it.
Now trap on the other hand is all about mechanics. Mount the gun, paying attention to the bird, swing, lead... Once I started shooting trap my ammo usage went to nothing. I went from burning through 4+ boxes of shells out on opening of dove to having a limit in under 2. The last time I went duck hunting two years ago I bagged 5 birds for 8 shots, and two of those were finishing shots. Grouse are still a bit of a challenge. Those little buggers seem to know exactly where to fly to catch you off guard or put just enough between you. Pheasant are just a snore to me, sorry. My granddad's Winchester Mod12 and some #6 heavy game loads are murder on ditch chickens.
One thing I noticed after shooting trap was how slow and deliberate I started getting when shooting at game. I always thought I had to rush, to get the gun up and shoot. I heard someone once say "Slow is smooth, smooth is fast." I heard that and thought it summed up what I had found in my progression. Now I worry more about getting the gun up right and swinging properly then shooting. Heck, I am probably one of the few people you will ever see that goes waterfowl hunting with a double barrel. Why do I need a slick auto that can pump out 3 rounds fast, when I can go BOOM, splash?
A suggestion for learning proper form would be to search out any local trap clubs. If they are a good club with good guys they will give you pointers as you shoot. But watch out if you have an addictive personality, you'll get sucked in. That's what happened to me. I went to buff up before dove season and guys started giving me pointers. Next thing you know I was shooting 100-150 rounds a week in the summer.
Remember, shoot straight and shoot often.
Good... Bad... I'm the guy with the gun.