feedback

from what I can see, you are really thinking about an audience study: ie women's responses to/readings of Hitchcock's female characters

'how he chooses his heroines for female audiences' assumes he does, and you need to avoid any assumptions like this.

OR you can look at changing representations over time, and the influence of hitchcocks reps of women on other directors/films

avoid trying to do everything - you must think about narrowing your focus