Well I was in the same job but I went from him to her from a Friday to Monday. I used the female toilets etc straight away, I was treated as me straight away. To be honest no one gave a flick, yes I got questions and people stumbled over pronouns and names. Women were very accepting immediately, most guys stumbled a bit more in not quite knowing how to treat me. They got over it.
Do present as a normal woman of your age, I'm a professional woman and I present as other women of my status. We don't get 'dolled up' that is for when I go out.
Now a caveat, I'm Australian and Australians are very accepting, I'm not sure how it is where you are, but to be honest if you get the chance at the job, go as you. JMO