I personally wanted to get into Japanese Animation for the longest time and I've read that many of the Japanese artist that do that type of animation are very disciplined and most of them start off drawing manga which if a Japanese type of comic book. Unfortunately I do not live in Japan so I don't have much opportunity to get into the field.
However, CGI computer animation is mainstream now a days and there are a lot of computer programs that will assists you on how objects move but the rest will have to be you. Like the person mentioned above about their roommate is that you should focus on the properties of animation more then anything. That's why in mainstream professional animation they have different teams, one team designs the characters and another team focuses on how the animation flows and moves.