Hey there! I think there are questions you need to ask yourself before you get your chicks.
What do you want out of your chickens? Predator resistance? Meat? Eggs? A pet? Or a combination of these. THEN do some research and pick your breed accordingly.
Also make sure you are ready for all that...
Not to nickpick, but feet square is not the same as square feet. Just for ease of communicating, 5 feet square means 5x5, 5 square feet means about 2.23x2.23.
Penn State Extension says "When poults are from eight weeks to market age, provide three to five square feet of confined housing space...