Join DU or Delta Waterfowl or both and start hanging around with waterfowl hunters ask questions, perhaps get invited on a hunt with seasoned duck hunters.. There is a lot to learn, you should learn how to call and there are different calls for different ducks. In addition, you must learn to identify ducks in the air before you pull the trigger, different species have different bag limits and different seasons. Waterfowl hunting involves much more then buying a shotgun boat and some decoys and you evolve into it. You don't want to be shooting things you can't shoot or too many of those with lower bag limits. Waterfowl are protected by both state and federal laws so you want to know what you are doing. It will take time, you will not be a good waterfowler overnight.