All the best. If it can help, put your bike in the car, drive to a trailhead, then hit either the Santa Ana River Trail or the San Gabriel River Trail. There is enough mileage to go on both those trails before you get your confidence back on the road. I am in Orange County too, and I am always glad to make it back home after my rides. There are just too many inattentive drivers out there, but I won't stop riding. Good luck, and welcome back.