I have one year left in college and then I will graduate with a degree in Mechanical Engineering. Unfortunately, I haven't learned much at all about drawing things using a CAD program. We had to draw simple things using PRO E for a class but it's not much. This won't help me at all if I start looking for a job after I graduate, so what's the best way to really learn something like PRO E? Knowledge of which programs will make me most attractive to employers after I graduate (I think PRO E is a good one)?