Oh, Granny - I knew I should have gone to the swap if only to keep you from doing it again, lol. J/K - since this is something you've wanted for a while I am glad you finally have your duck.
We had ducks for a few years after moving out here - I was probably a *bad* duck owner as I simply fenced off a part of the yard (we have a large, stocked pond in the front of the house so I fenced off the yard that is around that), gave them a little house to go into when they wanted and used one of those black rubber pans for their feed (though they really enjoyed swiping the food we tossed out for the fish)....oh, and in the winter when the pond froze I had a plug in dog bowl for drinking water for them. Beyond that - they just lived out there.
Our white duck, Judy, was a Pekin - I bet if you take a picture of your duck we can get it ID'd for you. She started it all and came to us as a bit of an unplanned favor for someone who couldn't keep her - she was VERY friendly at that point because she didn't know she was a duck (had been raised as a backyard pet and seemed to think of herself more as a person or a dog than a duck) - we ended up getting her two duck friends because she was SO needy, she figured out how to be a duck and was way less people friendly, but did seem happier. Your duck won't be so lonely because you have other birds for her.