Hi!
Check out the setup tweetysvoice has.
Something I discovered is that it does take some time to keep the brooder and pen clean. At the same time, if you have a really good setup, it is not that big a deal.
Wifezilla has a good brooder setup, too, it's shown in some older posts.
There are a number of really good ones, but those are the first two I thought of.
Water management. That's key.
With ducklings, you need to work on a design that will keep the brooder bedding fairly dry, and at the same time, provide the ducklings with relatively clean water (it starts out clean, but ducklings will make it murky . . . they cannot help it, they love to play in water, and their bills are such that they spill quite a bit) 24/7, for drinking and head washing.
Take a spin around the forum. Try some keyword phrases like "duckling brooder" "duckling water" "duckling mess."
Note the number of topics that are something like, "when can they go outside?" because at times the new duck person is having trouble keeping the brooder clean.
Now, if you want to adopt adult ducks, you don't have to worry about the brooder phase, but you still need to provide an environment where water and wastes are managed. It can be done. Thousands of people do just fine with loads of planning and some work. Some work harder than others, because of other things like climate, or other responsibilities, or budget.
So, please ask questions, please take advantage of all the good information available, and
Welcome to the threshold of Duckdom!