If you're officially diagnosed with ASD, I believe there's something called "vocational rehabilitation," which could help you find employment. It seems as if they would have that, California being a big state and all.
Or...sometimes, you could just walk into a retail place or a fast food place and ask for an application. In some retail places like Macy's, you could fill out an online application in the store. Sometimes, at fast food places, you might even get an interview right there.
If there's a store that is just opening, I would definitely pop in there.
Costco's actually a good place to get employment. The starting salary is at least $11 per hour.
Or you could fill out an online application from your home. Or you could get on the California state job service website or whatever it's called, and upload your resume there.
Or you could walk into a garage and inquire whether they have "helper" positions. Tell them what you're doing in school. If that particular garage doesn't have one, maybe the person there could refer you to another garage.
Don't they have something at your school which could help you with employment as well?