The world of cinema is huge! are you an actor? a producer? special effect? post production graphic designer? make up artist?
The best thing you can have, in any field in cinema or not, is experience in that specific field, aside of that it depends on what you do, some graphic school will be a great bonus if you want to do post production graphics. Some acting schools might help with getting job as actors. For actors, it's also important to have specific look, a great head shot and probably a good agent.
