I don't know who the state of California hires to design their DMV website, but whoever it is they should not be paid a cent! It is the most incredibly convoluted nonsensical bunch of not understandable information I have ever tried to navigate online. Throughout the process you don't know what you've properly completed or where you are in this bizarre process of simply renewing your California driver license.
Having grown up in California, I am very aware of the nightmares I experienced just knowing that the renewal of my CDL was looming. That was only 50 years ago, but what they have in store for all of us now makes that seem like a walk in the park.