you can also do low voltage in California under a general electrician's license, without having to learn all of the networking stuff that we will probably never use. A friend just got a C-7 and he says that A-V installing requires about 5% of the stuff you have to learn to pass the C-7.
If you have watched electricians, know how outlets should be grounded, can read a manual (LOL on That One!), and take a short course, you may find that to be a simpler approach. The subject is easier...and I'd rather learn 95% of easy stuff I'll never use than 95% of difficult stuff I'll never use.