I need help with muzzleloader Q

[HANDGUNNER]

My son is turning into a history buff. He wants to deer hunt this year with a classical looking muzzeloader in the worst way. I'm a very experienced shooter, (pistols, rifles, IN-LINE MUZZELOADER,) but I know nothing about flintlocks or any type other than IN-LINE. I don't know anything about the older style guns. I wouldn't know how to ready the thing for firing. I need some guidance here. What should I be looking for, what do I need to go with it. I don't know anything about patches and round balls.