Welcome. Agree with everything. Hardware cloth secure space is everything and solves so many problems, diseases, fighting, etc...Welcome to BYC.
You'll need a coop quickly.
Be sure to include plenty of ventilation. They need at least 1 sq foot (hardware covered) opening per chicken. Especially when it's cold. Don't be tempted to cover the openings in cold weather.
They also need 1 ft of roost per chicken and 4 sq foot on the floor, not counting nest boxes. You need at least a 100 sq ft covered run with room for two feeders and waters.
Don't skimp on space, ventilation, or hardware cloth and your girls will stay healthy.