Here's how I do it .
Cut off the legs , use a knife to cut around the knee joint ,you then should bend the joint and take it apart.
Cut the neck off , I use poultry shears
Cut the wings off just before the breast ,I use poultry shears
Under a wing the breast skin is thin, make a small cut and peel the skin off the whole bird like a orange ( easy if still warm)
You can now just cut the breast out and bone it like chicken ,I also take the legs and thys .
If you want to you can split it up the back and gut it to roast the whole bird .
DO NOT over cook duck it will be like trying to eat a hockey puck.