When I first started with poultry/waterfowl, my hatches were awful... beyond awful actually. I remember my first hatch many years ago was a half dozen quail eggs- zero hatched. Then I tried about the same number of chicken eggs- zero hatched. Then some friends of my Mom gave me a mixed assortment of about 30 duck/chicken/guinea eggs- only a couple hatched and many were dead in the shell after pipping (probably because I opened the incubator constantly to check on them.)
After my initial bad luck, I convinced my parents to buy me my first real 'bator which was a round styrofoam unit (this was like 25 years ago). FINALLY! I started getting 60-80% hatches.
What I learned early on was to 1. Get good quality eggs from people that are actual breeders. 2. Get a decent incubator that maintains heat/humidity. 3. Let nature take its course, don't constantly disrupt the eggs. Now, I put the eggs in the incubator and just leave them, monitoring the temp/humidity from the outside. I also very rarely assist hatches.
It can be discouraging when you are first starting out, but once you have success- it become an addiction!