The saying is that Skeet is hard to learn, and easy to master. Trap is easy to learn and hard to master.

With Skeet, the clays cross you laterally, but in a consistent pattern. With Trap, they go almost straight away from you, but vary a bit in flight path. Wobble Trap just kinda elaborates on that, and is a pretty normal way to casually shoot Trap, especially if the shooter isn’t moving between pulls. Sporting Clays and 5-Stand are a little more complex, and you should have a grasp on Skeet and Trap first.