I would wait 5 months. And then I would look around locally to other chicken owners and get an adult roo, as old as possible if you are wanting a roo to protect the flock while free ranging in rough country, they need to be close to a year old to be mature enough. If you can get one that old, his personality will be developed, and you will be able to tell if he is human aggressive. As for integration into the flock, giving a flock of hens a rooster is one of the easiest to make.
There is no advantage to raising a rooster, and roosters are cheap, cause everyone needs to get rid of the extra's. As for hand raising a rooster, you really do not want a PET. It seems counter intuitive, but if you are nice to a rooster, they think you are submissive to them, and often become quite aggressive. Roosters need to be taught that they must always give you space, they need to get out of your way, and they should not sit on your knee, or jump up on you. Roosters can ruin the whole chicken experience, and they can be quite dangerous to little children.
The other point, sometimes even experienced poultiers, (I am talking from experience here
can mistake a rooster for a hen, until he crows) so you might already have one.
Mrs. K