How is CA 198 from California I 5 to CA 101

Looks like 152 would get you there, but the map appears the road is very twisty between the 5 and Watsonville. If you are not limited by time and want a more scenic route, you could consider going further north in order to stay on freeways. Either the 5 or the 99 to the 120/205/580, then pick a route through San Jose.