Another weonderful creation, cheng; thank you for coming them coming.
Six to a gun seems fine as regards handling it and loading, but I think there would also have been a gun captain. There would also have been powder monkeys serving the guns - young boys who would bring up fresh supplies of gunpowder from the ship's magazine to the gun crews.
As for long hair, again that's OK. Ironically, the long haired wigs worn by the rich were coverring their bald heads, shaved so they could wear the wigs.