loralie and melissa, i think you'll be fine in the class. remember the weights will be only 5 lbs.
unless they bring alot of equipment (stability balls, bands, step), i think the exercises will be pretty basic. perhpas we may be doing a variety of lunges (low end/high end, walking lunges, side lunges, side and front lunges using a paper plate), squats (regular, plie, one leg, narrow stance, or wide stance), and deadlifts. i think cathe did mention the paper plates, so you may want to try them at home...it may take some time to feel comfortable with this movement. another one you may want to try is the one leg touch down squat. you do a squat on one leg, touch the floor and then go back up. i don't know what cathe will be doing, but these are some of the exercises you may see from sts.
i think in the workout manager there are pictures of cathe doing the exercises (at least there used to be) and if you go into the calender feature to schedule a workout and select STS workouts and then enter disk #3,6,9,or 12, a list of the exercises will come up.