Michelle, as a new chicken keeper myself, I can relate your reservations about building a coop with no prior building experience. I can say that I am so glad we built our own coop. We had never frame-built anything before. While it was time consuming and challenging, it is super rewarding. Plus, you learn some skills needed to maintain the coop over time, swap out materials, customize, or add on in the future. We adapted ours with a larger covered run. We used the Garden Coop plans - very precise and user friendly for a first time builder. You can view here:
http://www.thegardencoop.com/ We planned, prepped, and built months before we had chicks. I agree with others who have noted that prefab, ready to purchase coops are flimsy and too short. I appreciate standing and walking in the coop without ducking. If I could do it over again, I would have built bigger. I am so proud of our coop! If you decide to go for it, good luck! There is so much support here in the community, and if you search the posts that already exist on the forum, you will find tons of advice already offered.