You won't get that star anyway, and it can just limit you in developing a new character. I research, I write notes, I write info about the characters, lines of dialogue or even some scenes I love. If you don't thoroughly know your characters you have no point of view, no voice, no life in your script. The only way to get to the bottom of your characters is to write a lot and don't think about it too hard. Play with it.
Wonderful things come out of that.
Put off writing the script longer while you noodle on it, writing about people and scenes you can see them in. At some point a door opens up and you'll find your way into the script. Don't just outline what will happen then start writing the script. You'll get stuck midway and find your characters aren't working. If your characters are working they are telling you where to go with your story.