James McAvoy is “excited” to step into the “whole new world” of being a director. The 45-year-old actor is preparing to step behind the camera to helm ‘California Schemin” – which is based on the true story of two Scottish friends, Gavin Bain and Billy Boyd, who pretended to be an American rap duo – and he is looking forward to getting started on the project. He told The Hollywood Reporter: “It’s a whole new world for me to do this. “I’ve got experience with everything else after we start rehearsals. This whole period of prep, I’ve never been a part of it, so I’m excited.” James will also app…