Complex sentence: She moved from Nebraska to Southern California to become an actress, but although she has been to casting calls and auditions, she has failed to find acting work--so pay the bills, she works as a waitress at The Cheesecake Factory.
Split into simpler sentences: She moved from Nebraska to Southern California to become an actress, but although she has been to casting calls and auditions, she has failed to find acting work. To pay the bills, she works as a waitress at The Cheesecake Factory.