So I don't know your resume and what you have taken care of yet, but here is some general advice.
I would recommend getting a job in a health-care or biomedical research field. ER scribe, lab tech, pharmacy tech, something like that. This way, you can knock out the "clinical exposure" criterion while simultaneously having some disposable income. If you don't work with physicians, then you should make room for some shadowing hours. Make sure to contact some physicians and request some shadowing hours, and do this soon. You don't want your first time seeing a physician in action to be in your senior year.
Take the lightest course load you can, since if you MUST work, then you can't afford to try and impress adcoms with a heavy course load (I took 20+ credits every semester and nobody was impressed). Maintaining high grades is more important than the number of classes you take.
Also realize that working in research will take 15-25 hr/week for anything meaningful to come out of it. If you don't intend on research, focus on spending time volunteering or participating in some altruistic pursuit. Basically something to show you care about people's welfare. If you do intend on getting a research job, try to squeeze in this volunteering before you have to start. Who knows, perhaps you will find a way to do both simultaneously.
And then you have to consider making time to prep for the MCAT, which is a whole another story. How you find time to prep for this will depend entirely on what you are involved in and when you intend to take the test.
However, I was on the east coast and applied with a research-heavy focus. Perhaps someone on the west coast can give you some advice on balancing volunteering with your part-time job.