Traffic Lane Violations: Traffic School After Enrolling in a Installment Payment Plan for a Hov Violation

My question involves a traffic ticket from the state of: California

I recently received a ticket for driving in the HOV lane solo.
I enrolled in a payment plan, and did not request traffic school, but now realized I will get a point for pleading guilty(paying the ticket).
My question is it to late to request traffic school after I've enrolled in the payment plan, and if so, how?

Traffic Lane Violations: Traffic School After Enrolling in a Installment Payment Plan for a Hov Violation