Before you begin, you should familiarize yourself with both IDL and the CAM Interactive Analysis (CIA) package. In addition to suggestions available here, the CIA manual provides extensive details on user commands and the options available at each step of the reduction process. A summary of commands is available both within CIA (Appendix B of the CIA manual) and on the CIA quick reference guide. Additionally, Marc Sauvage's CIA page contains the CIA frequently asked questions and CIA tips.
Expected time commitment for getting started.