Can 2nd the recommendation for Kitzbuhel, or you could consider Obertauern. As a new skier, you'll appreciate the good range of blue and green slopes once you get enough confidence to start ranging about. Also, Austrian food is delicious and excellent quality: very calorific but what the hell, you're skiiing all day. Can't overestimate the importance of training before you go. It's helpful that you're already fit, but make sure you train, train, train your legs and back - ask at your gym for recommendations on pre-ski exercise. The fitter you are easier it'll be to retain your balance and the more you'll be able to keep going all day and recover easily from falls.