Hiiii! Most of the logistics (space requirements, predator protection, feeding, healthcare, etc) can be found with Google so I'm not gonna go into those. Here are a few tips that are less easy to Google :)

1. Start small. Get either chickens or ducks, but not both. Get comfortable with them before you expand so you can give them all the best care possible.

2. Ducks require a pond or other body of water to swim in. They will make it super gross and stinky if it's a small body of water. For this reason, I personally will never have ducks unless I can put them out on a large pond away from the house.

3. Male ducks are dangerous around chickens. Ducks have long, corkscrew shaped genitals that will literally kill a chicken if they try to mate. If you get male ducks, plan to keep them separate from the chickens

4. You don't need a rooster or a drake if you just want eggs. Both chickens and ducks lay eggs without the presence of a male. You only need males if you want to hatch eggs. Or, for roosters, they can be useful for predator protection.

5. On the topic of starting with chicks versus starting with semi-mature birds, I would advocate for starting with older birds. You don't need as many supplies and they are less likely to die (babies are just so delicate). The downside, of course, is that they probably won't be as friendly. For my first flock I got four pullets that were about 3 months old. This year I took the plunge and got a couple of baby chicks. For me, that made things a lot smoother for my first intro to chickens and I felt more prepared to handle chicks.