CA is not going to get your state return until your federal return can be accepted by the IRS. The IRS is not going to start accepting/rejecting returns until January 28. Until then, your return is in pending.
The IRS will not begin to accept/reject returns until January 28. Until then, e-filed returns will just be sitting on a server, waiting. You will receive an email after that date letting you know if your return was accepted or rejected. It will probably take several days after January 28 for them to work through the backlog of returns on the server.
https://ttlc.intuit.com/questions/4169486-can-i-change-my-return-if-i-already-submitted-it-and-you-re-holding-it-until-the-irs-opens