As I understand it, the difference between Skeet and Trap is the number and direction the clay birds are thrown?
I never could shoot "on the wing".
I just showed up where I was told to go, and followed whatever rules I was given. Skeet and Trap were all the same to me, and I competed for a few years in both as a kid - as well as "rabbit trap" - which is a ground-based clays event.
Here is the only advice I give:
1.) Get a gun that points naturally for you, and does not beat you up; shoot it a lot. For me the Remington 1100 in 12 ga. was the gold standard. The kick is mild, it points well, and I could hit with it. Find what you like, stick with it, and ignore anyone with more money, or opinions, about your gun than what I put into that first sentence.
2.) Make friends with someone into the sport - but not TOO into it. You want a shooting partner who will challenge you, but who won't do their best to turn you into their clone. My technique was terrible according to every "expert" I met, but I generally scored fourth or better in tournaments against guys who had actual coaches, as well as some of these adult "experts" (I was between 12 and 15). I just had my dad who told me to stand in a way that was stable, comfortable, and allowed for movement. As long as I could hit I must be doing something right.
When you are learning, follow the advice of people who are doing better. If you are doing better than the pack, ignore anyone who tells you you are doing it wrong.
3.) There are reflexive, or wing shooters (me) and there are trackers (my dad) figure out which one you are better at and honestly watch someone who is good at that. Just go to events and watch. I spent a lot of time on ranges without actually firing on the line.
4.) Get your own thrower or launcher and someone to run it. Get a thrower as close to the one you will be using in competition as possible (unless you're just planning on shooting with friends). At the smaller events they always used the same manual thrower we had at home. I thought I was awesome at these events.
I qualified for a big event at a fancy range and the electric thrower, something totally new to me at that point in my life, threw the first two out so fast they were on the horizon before I could react. I had one of the worst showings there ever.
Dad bought a fancy-pants electric thrower after that and I pretty much had to re-train my reaction speed.
5.) Try to relax and have fun. At some events we would all give each other a hard time and throw out taunts and insults. This was fine and I could mostly ignore it, or join in. It only really bothered me if I got the giggles and couldn't stop. When someone told me I made an amazing shot, however, (like the time the guy hit the switch while I was still loading, and I managed to bust two from the hip) that was the end of my day. If anyone ever gave me an attaboy I couldn't hit anything smaller or faster than a derelict dump truck for the rest of the day.