Hi and welcome!
You're in for some great fun! I agree with the others who suggest getting some books to read. There's even one that your son may enjoy:
Your Chickens: A Kid's Guide to Raising and Showing, by Gail Damerow
My kids are 12 and 10 and LOVE their chickens! They read the Damerow book before we got started so that they knew the needs of the chickens. They are involved in all parts of the care for the girls and even though the girls are nearly 2 years old, they've not lost interest in the least. We have three hens and they are very much pets. Since we got them as chicks and they were handled by the children from early on, they're quite friendly and docile.
Again, welcome to BYC!