Good for you, doing research and joining this community BEFORE you bring home chicks! My family had chickens when I was growing up, and I guess I didn't pay enough attention because I've certainly learned Much More since I became a BYC member.
BYC offers great online information and plenty of it. But, as someone who's pretty Old School, I still enjoy books. One that I've found useful is Gail Damerow's "Hatching and Brooding Your Own Chicks," from Storey publishing, which specializes in homesteading books. Damerow covers details on acquiring chicks, setting up a brooder, what and how to feed and provide water, and what to expect as they grow.
Most prefab coops are far from ideal. However, some can be improved with a few modifications that don't require a lot of construction skill. But, the majority of prefabs will overestimate the number of chickens that can Happily live within them. I bought one in an emergency that said it could hold 5-6 birds. Maybe, if they stood on top of each other! Fortunately, I only needed to house two.
Whatever you do, don't believe that chicken wire protects poultry. It's designed to keep them in, not to keep predators out!
If you've waded through this lengthy post, congrats on your patience and welcome to BYC! Let us know when you get your chicks, please!