At first, the assistant makeup artist was really a handyman, helping the makeup artist with things and running errands. In fact, you always stand by and watch. You can learn something if you put your heart into it. If you get along well with other makeup artists and give you advice when you are not busy, you will learn faster.
As for the working hours, they may be long or short, depending on the actual situation in the store, so I won't say much here.