Any film I do is not going to change the way black women have been portrayed, or black people have been portrayed, in cinema since the days of D.W. Griffith.
The best preparation for acting is life - observing life and people and observing yourself. All that becomes your library. So when you have to research a part, a scene or an emotion, you go into the library and get what you need.
As much as I'd like to meet the tooth fairy on an evening walk, I don't really believe it can happen.