If you are not, you still have time to get it done. The deadline has been extended again, it’s May 7, 2025. I wrote my first article about this in 2017, the links in it are still valid. So, if you need to get your California driver’s license REAL ID ready and want how-to information, read my article.
Without the REAL ID, you will need a passport to travel domestically as well as international.