Most hatcheries will supply you with a free how-to guide for raising chicks. If you have a State agricultural extension service they have free books and sometimes even a county agent to give you free advice. Or you can pick up a good book on raising poultry at the library or bookstore.
Chickens can be, with a bit of work on your part, a "perpetual meat-n-egg producing machine". I've kept a flock of fifty or more for many years now and enjoy both meat and eggs, and a yard free of ticks. I let them free range. I keep a few ducks too and they act as sentries since they don't sleep all night like chickens do. Guineas make good sentries too, but I can't stand the constant noise they make, and they don't tend to stick with the chicken flock the way the ducks do. Also, my dogs are accustomed to the flock and think of them as their property and guard them.
Codger