Don't bother with calls. As for decoys, I would go on to Cabelas website. They have all different brands with a range in prices. Get 2 doz of the diver you see most offten in your area. If its bluebill(scaup), get 2 doz, then once you become more experienced, add on a doz redheads, maybe half a doz buffleheads, maybe a doz canvasbacks.