It is theoretically not too late to change plans, but you need to check how suitable the CC->transfer plan is. Things to consider:
- You may not be admitted to a desired UC or CSU as a transfer if your CC grades are not high enough.
- If you are very advanced in one or more subjects, starting at CC may impose a temporary "ceiling" because there are no upper division courses at CCs. Advanced students at four year schools may take upper division courses in their frosh or soph years.
- Check http://www.assist.org to see if the frosh/soph courses for your major at UCs and CSUs are covered by the CCs in your area, and check how difficult it is to get into those courses at the CCs (since they are open admission, they cannot regulate enrollment through admission like UCs and CSUs do). Since the fall semester is close to starting at semester system schools (like most CCs), you may be last in the waitlist for popular courses if you register at a CC now. If there are many uncovered courses, you will have to take many "catch up" courses after transfer to the UC or CSU.