It sounds like you have your mind in a lot of different places. Remember that becoming a doctor takes a serious commitment, so it would be best to do some more research and figure out which path you'd like to take. A good place to start may be a community college, depending on your financial situation. There you'd be able to get started on your gen eds. Eventually you will have to transfer to a four-year university and earn a bachelors degree. "Pre-med" can basically be offered anywhere, because it's not so much a major as it is a sequence of prerequisites that you'll be taking in your course of study. You could always visit schools in your area and meet with an adviser to get a better idea. So with that being said...
You'll need to do extremely well in your classes. The higher you can go on your science GPA as well as your cumulative GPA, the better. (We're talking no less than a 3.5, especially in Cali). You don't necessarily have to choose a Science major, but you will have to take some science courses, especially chemistry, organic chemistry, biology and physics. The prerequisite requirements and recommendations vary by school, but those are generally required everywhere. You'll really want to develop solid study skills right off the bat, because they will only help you later on. Also, get to know your science professors. You'll need letters of recommendation later.
Look into doing some volunteer work, both in and out of the medical field. Try to get involved in any clubs or anything that interest you as well. Medical schools love well-rounded people. Just make sure none of it takes away from your studies, because GPA gets you in the door... Without the numbers, they won't even talk to you!
Possibly talk to a couple of physicians and see if you can do some observation/shadowing. Make sure it's something that you're actually interested in before you get too far in the process. It's a lot of blood, sweat and tears (figuratively speaking) just to find out later that it isn't what you want to do.
But going back to what I said earlier... Think about it. Make sure your mind is right about becoming a physician. A lot of people think they want it but aren't willing to put in the work. So if you're serious about it... See above.
Good luck! Hope that helps.