Transferring Credits to Cal

Hey so I was admitted to Cal yesterday as a freshman applicant, not as a transfer student. However, throughout my HS, I have been taking community courses that I thought I could use to get a head start in case I went to community college and wanted to transfer to Berkeley. So, I have completed 5 courses with a total of 15 credits. Can I still transfer them and how do I do it? :o Thank you for your help! The transferring credit process is a bit fuzzy to me so any links would be helpful too. Thanks!