Hi Twilight3. Do you know anyone here in CA? That would be very helpful. Los Angeles is a big city, and keep in mind that what you see on T.V. is a very small part of it, there is much more to it, and not all areas are near as nice as what is shown on T.V.!
I lived in L.A. for almost 10 years, and there are a lot of areas that are not that great, so do your research before you just decide to come. I now live in northern CA (the Bay Area) which is nice (I like it SO much better than LA) but it also has its areas that are not so nice.
Also, you don't want to alienate your parents, they don't deserve that. If this is something you really want to do, make sure you sit them down and explain that to them, and let them know that if it doesn't work out for you, or that you don't like CA after all, you can always come back home! That might make it a little easier for them to take.
But you sound young, and you will be a nurse, how wonderful for you. If CA is where you would really like to go, then do it while you're still young enough! Just do your research first!!!
Good luck and keep us posted!