Why plan on waiting? It isn’t like you only get one shot at applying. If you apply and they turn you down, then you’re in the same situation as if you had decided to wait to apply and you spend another year at the CC. If they take you then you’re ahead of the game.
That said, Econ is a competitive major at most UCs for xfer and so you may not get in. UCLA, for example, says “The most competitive applicants for Business Economics, Economics, and Psychology will have completed all major prep by the end of fall prior to transfer.” It sounds like you’ll have some done in the Fall, the rest in Spring.