There is not a training course for the FSC. The state of California does put out a study guide. You can read more about that using this link California FSC Study Guide.

To obtain an FSC you must score at least 75% (23 correct answers out of 30 questions) on the FSC Test covering firearm safety and basic firearms laws. The true/false and multiple choice test is administered by Instructors certified by the Department of Justice. Dobbs Firearm Training does offer this testing by appointment.