It is really easy once you realize just how simple it is. It's actually less work in the winter than during the summer when you are trying to keep them cooler.
The coop should not be air-tight, as that would definitely lead to frostbite. The coop needs ventilation to carry the warm moist air up and out of the coop.
Collect your eggs frequently. You will get to know the laying habits of your chickens and learn to gauge when they lay eggs, so time your collections around the chicken’s schedule.