If you're working out first thing in the morning, then leave the cardio til after your workout. If you can go to the gym later in the day, then do your cardio first thing in the morning on an empty stomach, then workout later on.
When you're working out, keep the reps up and your rest periods short, you need to keep your heart rate up as much as possible.
With your diet, keep a check of roughly how many calories you take in each day, and if you haven't lost anything by the end of the week, reduce your intake by 100 calories per day, until you find the perfect level for your body.