Welcome to BYC! I think it is a good idea to get your sister involved in raising chickens. My best advice it to make sure you have everything set up before you buy the actual birds. A draft free and predator proof coop is the number is the most important thing, and there should be ventilation holes near the ceiling to allow moisture to escape. A predator proof run is also very important. I hope you will find BYC helpful with this new project, and I hope you will ask questions in the forums when you need help.