Using your knowledge, I've been associated with the ODW trap trailer that they take around the state at our range in Ponca several times.So far everyone has addressed only half of what you need to know, about chokes. The other and probably most important part is about actually hitting and breaking the clays. There are two methods of shooting skeet. The first is the sustained lead and the second is the swing through. Since this will be your first time, I am going to suggest the swing through method to get you started. The speed of the clays will probably surprise you at first. Basically what you do is start the barrel out behind the bird and as you swing the barrel past it you squeeze the trigger. This gets your aim point past the target giving you the lead time you need for the shot charge and clay to arrive at the same place at the same time. The important thing to remember is even after you pull the trigger you must make yourself continue to swing the barrel. The most fundamental error a newbie makes is stopping the swing as they pull the trigger. You will always be behind the bird if you stop your swing.
One more thing and this may be the most important of all. The ultimate embarrassment is calling "PULL" and then nothing goes boom. You then have that duh moment when you realize you forgot to take the safety off.
When explaining leade on the clay to new shooters in some of our programs, I tell them to equate it chasing your kid around the yard with a garden hose. You have to stay ahead of the kid to get the water on them, and it makes sense to them then.
They don't understand swing through, etc. that shooters can relate to.
I do know there are two theories about leade. One is European that you describe and the other is leade and shoot.
Different trainers use either of those methods, but they are certainly different. Pick one and train.
