Enjoy the rest of your life as a California addict. Welcome!
There are lots of tips on the forum for first-time users. My tip is always to keep it lean and not buy things other people like. Packing is highly personal, and I have met no two California users with the same packing habits. You will find out on your first trip.
Best tip: get out for a long weekend before the long journey starts and read the manual. At least the comprehensive one.