Welcome to the community. I'm from East Central Indiana. My suggestion would be to build your coop for more chickens than you want to start out with then grow into it. If your coop will hold 20 then start out with 10 or 12 then add as you go if you want. Also, you will have to determine what you want your chickens to do for you. I knew I wanted good brown egg layers that were hardy for the winter months. We decided on Plymouth Barr Rocks. You will have to research the breeds to find what you want. MY PET CHICKEN has a good breed selector program on their site that I used. We started with 12. Since then I've added some Black Sex Links, one black astrolorp, and one buff orpington. The black sex links seem to be the more proficient layers, but the Plymouth Barr Rocks are giving us some good Jumbo eggs.