Student or Learner
"It takes him two minutes to dress his hair or make his hair style."
"It takes her two hours to dress herself."
1. We generally say that we "do" our hair in BrE.
It takes him two minutes to do his hair.
However, it would be simpler in this context to say exactly what he does to his hair - brush/comb/gel/spray etc.
A hairdresser might "dress" a bride's hair for her wedding day. It suggests a much longer, more complicated process, resulting in a very impressive, beautiful look.
2. "It takes her two hours to get dressed" is more natural in BrE.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.