Complex sentence: He started in the film industry as an animator, having made short films as a child and then attended the California Institute of the Arts, he worked for Disney and other studios for several years as a storyboard artist and animator, before progressing to directing.
Split into simpler sentences: He started in the film industry as an animator, having made short films as a child and then attended the California Institute of the Arts. He worked for Disney and other studios for several years as a storyboard artist and animator, before progressing to directing.