Just bear in mind that cardio gets rid of the fat that covers the muscles along with watching your diet. Eat smart. Cardio 4 times a week or more.
Stand with feet shoulder width apart. Then bend to your right sideways, with your right hand sliding down your right thigh and left arm extending overhead ( bent or straight ). Pause, than go back to standing position and perform same thing on left side. Do 30 alternating reps on each side. You can work up to using light 1-3 pound dumbells as you get stronger.
To ensure your form is correct please use mirrors and / or consult a personal trainer when using the weights. Proper form prevents injury and ensures you get the maximum benefits from exercises.