Hi E1453,
Performance wise the King Air is a beautifull plane as it is in every other aspect. I've done about 2000 hrs on it in VIP charter and loved the plane. Single engine performance is great and with the rudder assist (also a very basic but non the less effective system) a very pilot friendly aircraft.
Id say, sit back and relax, listen to you instructor and study the books and youll enjoy the ride from the first flight on...
have fun