Welcome to BYC, enjoy your time here. Often, it's the cockerels who have been turned into "pets" that become human aggressive. I adopt a hands off, arm's length away policy with my cockerels the moment I figure out that they are boys. I don't recommend that you keep a cockerel unless you intend to raise your own replacement birds, and have an exit policy for any cockerels you hatch. For first time flocks, I suggest that you:
A. Start with all pullets the first year. If you get a cockerel, rehome him.
B. If you absolutely MUST have a male in the first year, get him from an established flock. Do not get him until your pullets are all laying. Be sure he's a proven roo who is not human aggressive and that he treats his ladies nice. (A chick is a cockerel or pullet till a year old. Then it is called a rooster or hen.)
C. Wait until your second spring. Then introduce some straight run chicks into your flock, and choose the best cockerel. Your older hens will train him in proper dating etiquette.
Don't plan on adding more birds unless you have more than the minimum recommended spacing of 4 s.f. in coop and 10 s.f. in run per bird.