Welcome Amanda!
You might want to check out the 'Updated Ultimate Guide To Cathe Workouts' that is stickied at the top of this forum. It divides all of Cathe's workouts into categories and then ranks them from least to most intense.
That being said, I would suggest starting with a total body workout, a cardio workout (either step or kickboxing), and maybe a circuit or interval workout. If you'd like to buy a series, I'd recommend the Intensity or Body Blast series to start with. The Intensity Series has two circuit workouts (Bootcamp and Cardio and Weights), a total body workout (Muscle Endurance, my favorite Cathe workout), an upper and lower body split weight workout (the Pyramids), and an interval workout (IMAX 2). The Body Blast series has a two pure cardio workout (Step Blast, and Kick, Punch and Crunch), a circuit workout (Step, Jump, and Pump), two total body workouts (Push Pull, Supersets), and a lower body workout (Legs and Glutes). Overall, the workouts in the Body Blast series are ranked lower than those in the Intensity series.
HTH!
