It would be cheaper and easier to purchase a trio of Calls than it would be to hatch out a decent trio.
There are 2 kinds of "Calls" out there. There are pet quality who don't look like Calls at all. They are sort of small and look like little duck shaped ducks. Those are relatively inexpensive and much easier to hatch. I've seen a lot of photos of that kind here on BYC.
There are genuine Calls who are small, round, short billed, and puffy cheeked. That is what most people see that makes them decide they want Calls. They look a lot like rubber duckies, are a bit expensive, and tricky to hatch.
So, you must be careful when you buy hatching eggs about which of those 2 types of "Calls" you are buying eggs from.
If you are getting genuine purebred Calls, you will need a very good incubator. Nobody with Calls is using a styrofoam incubator.
Eggs on their sides, hand turn, rest every day, spritz with water that is exactly the same temperature as the air in the incubator, and probably assist at hatching. Not considered eggs for beginners.