you have another choice that would some easier regarding drive though it has a diversion of about 10 km but for new drivers I will recommend that you opt express way but at the point mussiari where the road straight climbs up to jhika gali, you must go straight instead of turning left to murree , the road will take you up to the point topa ask around about jhika gali that is about 10 km from here. hope you will enjoy the road. It is wider and levelled than mussiari route.