Naio, as I have said earlier, you will have no trouble with any part of this road, in your little van. But you asked for more detail on the north. The part from Marin to Stimson Beach is very twisty and slow, as is the part where the road leaves the coast and then heads inland to Leggett. (I have done that part with a small trailer. Not a problem, but not easy, either.)
The rest of the road is just fine. The views are fairly good -- the views are spectacular south of San Francisco to Morro Bay.
And just to whet your appetite for the area, this is a shot of the Lost Coast, taken above Mattole Campground:
Mattole Campground is just made for your van -- the road to get there is terrible, bad for trailers or big rigs, so you can take advantage of your small size and agility.
If you are interested in more photos and text, please feel free to click on my blog link below and use the search bar -- type in Big Sur, and Mattole, and Ft. Bragg, and Jackson State Forest, and Mendocino, and Humboldt Redwoods, and Prairie Creek, and Van Damme State Park, and Russian Gulch State Park, just for starters.