Animation : Working in Animation studio if you can't drawing and animating by Muhammad Azlan

That's a really good question, without a straightforward answer. Writers tend to not be involved in the production side of things because their influence may clash with the director's. That being said, if there is a showrunner position, assuming it's a series, then apply for an assistant Showrunner position or assistant to the showrunner. That way you can stay close to the story, while seeing how the entire production works.

The showrunner is essentially a mix between a producer and director in a series. They understand the show inside out, what makes it tick, what makes it consistent and is able to communicate that to the director, the artists, supervisors, editors and so on. They are usually writers or sometimes storyboard artists who have been on the team for a long time and hence have the most in dept knowledge of the story and production pipeline.

keKevin Jackson is this great for beginner level ? I actually just want to know how the animated film work because I might one day want to direct animation film.

Assistant to or production assistant would be an entry level. You would basically be a go-for in this type of role. Go for this, go for that, send this email, hand out these briefs etc. etc. It would be simple job that would allow you to get in easily, see how things work and eventually as time goes by, there may be room to move up depending on your skills and interests. Directors in animation tend to be the senior storyboard artists who are there for numbers of years and can draw really well or a director who simply has a lot of animations directed under their belt.