If you mean during training, then yes, there will be numerous occasions where you have to be in a certain place, or achieve a particular task, by a certain time, and if that means a quick shower or having to get up earlier or work longer, so be it. You'll have more to worry about than fixing your hair, especially out in the field on exercise, so for the duration of training, you'll have to get used to not fully drying it or brushing it between*lesson periods; give it a good wash and brush on your own time. Hair needs to be off the collar, so have it cut to a manageable length or find a quick fix like bundling it into a hairnet and making a quick bun.