There's a small percentage of people who can act. There's a small percentage who get to do this for a living. There's a swath of the population that are able to keep a story in their head and fight all the battles against self-consciousness and the surreal unnaturalness of acting in a movie. The technical aspects you can learn fairly quickly.
Tom HanksAn animatic is a process where every voice and every sound effect is added to rough animated drawings and it lasts exactly as long as the final movie. So you actually get to go into a screening room with the rest of the cast and you get to see it all at the same time.
Tom Hanks