The best advice is to start out small, and build your flock as you gain more experience. While raising chickens is not as complicated as rocket science, you will undoubtedly be better at it with each year of experience.
One of the craziest realizations we all make as we first learn about raising chickens is that the live chicks are actually delivered in the mail. If you hadn’t made that realization yet, don’t feel badly, but now you know!
Perhaps when you were in grade school you were lucky enough to hatch a chicken in your classroom from an egg. This approach to ordering your chicks is equally educational and can be an amazing experience for children.