If a girl is 17 and still doesn't have her period should she wear a hijab?

You should start wearing the hijab wayy earlier then 17. U should start wearing hijab at about the age of 6 or 7 so it will be easier for u as u get older if u start at 17 it will be very very hard for u to wear it all the tim wen u go out or wen u r around men who aren't u mahrams