Well first you can change your status to pre-dental. And then be prepared to come up with a good reason for adcoms about why your switching into dental considering your gpa is far too low for med and only relatively low for dental. As for california schools, I think it is actually very competitive esp schools like UCLA. Other activities that you should get involved in should obviously include dental shadowing and possibly the dental societies at your school. Congratulations on your decision and good luck.