First job,read descrirption!!!!?

I am a kid,today will be my first job.Not like,a real job.Just cleaning up at my barbershop.Sweeping I think thats it.How do I wow the barbers to show them Im a good employee.They told me show up anytime,so what time should I go.Should I just go when I get my haircut around 1,2,or3 or should I go in the morning like 10,11,12.Nd how do u use one of those big brooms like janitors,well i think it may be a big mop idk.Anyways best answer quick gets 10 points.