If you have never duck hunted it is hard to say what you will want in a dog. Once you go through a season with the dog, you will start to realize what it is you expect out of the dog and what it is you need to teach the dog to become a duck hunter.
I don't run field trials but I teach my dogs long blind retrieves because I got tired of going to get the ducks he didn't see fall. I teach my dogs remote sit on a place stand because there is not always room for me and my dog to sit side by side..... see where I am going with it. This is stuff you won't know about until you experience it. Take the dog hunting and you will see what I mean. You being a beginner yourself have no idea what to expect. But you will learn quickly what skills need to be taught.