San Diego is a nice city in California. It is really close to the U.S. Mexican border and the weather in San Diego is really good. During the winter it is always warm and you can go to Chick-fil-a whenever you want without worrying about it being too cold (unless it is Sunday).
It is expensive to live in California… it is among the seven most expensive states to live in. I recommend saving up 100 dollars before going. That way you can afford a house and a nice car to drive to places.