Well no one can say you're not spending the time to make sure you can write a character convincingly. Also nice idea to watch a movie about, I'm a visual learner too, maybe I'll watch it :)

I knew someone with bipolar disorder and I never knew she suffered from it for the year that I knew her. So it can be disguised really well. 
From what I know without googeling it too, is that it all depends on the severity and the symptoms you are dealing with. You can have two, three or any number of symptoms, but the basics are severe moodswings between one extreme and another. (mania)

What made you think your depiction isn't right?