Hi fellow duck lover!!
You’re very brave for attempting to have house ducks lol. First thing you need to know is they’re MESSY!! Like to the point where you think something so small can’t possibly create such a mess.
Like this is how I’ve been finding her pen the last few mornings. And this is mild lol.
Poop will be everywhere, all the time (cuz diapers aren’t for 24/7 wear so when they’re not chilling with you and in their pen you don’t want a diaper on them)
You’ll want to find the bedding that’s right for you. I used puppy pads for the longest time because when they’re little poop is all over the place. Some people use towels instead. Right now, since Penny is bigger, I use a painters cloth from the dollar store and pee pads for her food spot. Though she’s obviously playing with those so I have to figure out something else.
Now the MOST IMPORTANT THING is to NOT LET THEM IMPRINT ON YOU!!!!!!!!
I can not stress this enough!!!
It is NOT recommended to allow ducks to imprint on you. They live to 20 years and if at any point you want to rehome them you can’t because they’re imprinted on a human.
Human imprinting means they won’t understand basic duck behaviors, they won’t understand how to function in a flock, so they could never go with other ducks. They won’t mate with ducks either because they think they’re human and won’t know what to do with another duck. Also, males will get aggressive once their hormones kick in and attack you to mate with you.
You’re better off letting them do their thing the first week, and minimize interactions. That way they’ll bond to each other first. The first 5 days are crucial for imprinting. I know it’ll be hard but it’ll make your life easier if they just imprint on each other. They’ll still be just as cuddly when you start hanging out with them

But it’ll prevent some problems in the future.
Diaper wise, I wouldn’t bother with anyone but PartyFowl but they’re not very reliable so it’s annoying... however they do by far have the best product. You can try other companies but bottom line is PartyFowl had the best design. There’s a Pinterest DIY for a duckling diaper made from a sock, that might be easiest for when they’re still little.
Also keep in mind that it’s not recommended to allow ducklings to swim during their first week. Very high risk of getting too cooled off! It’s best to wait till they’re at least a week old, preferably two weeks
I’m sure you’re already aware but ducks are flock animals so it’s best to get two. My girl ended up by herself when her brother passed away a few weeks ago and I have to work very hard to make sure she isn’t lonely. The only reason I’m not adding another duck is because I wasn’t even supposed to have one and my family barely tolerated this one lol.
They’re needy, they’re messy, and they’re high maintenance. However, if you have the time to put into them ducks make wonderful companions! Just don’t underestimate the amount of work they are LOL