You don't need any training to pass the California Department of Justice, Bureau of Firearms Safety Certificate (FSC) test. You can download the free study guide here, look it over and take the exam at any convenient gun store and at most ranges.  I train the instructors who give these tests so I don't typically offer testing if that's all you need.  I can offer FSC testing and issue the certificates when we get together for one of my classes if you need one to purchase a firearm in California.  Everyone charges the same $25 fee.  None of my class fees include FSC testing.