Good plan seeing I am afraid of heights
Uh-oh! You'll be in a state of anxiety for a good part of the way. See if you can figure out how to get over that fear, or you won't be able to enjoy the trip. The most precipitous parts are in Marin County, just north of the Golden Gate Bridge, so I'd recommend leaving Rt. 1 for 101 till you get out of the scary spots, unless that's not north of Pt. Reyes. I forget just where along he coast that is. All I remember is driving along a road that was full of dangerous curves high above the sea just north of SF.