After a couple months you'll need to reinvigorate your stretching routine - at least 15 minutes before and after a workout.
Go for a 1 week doing a mix of majority cardio and light lifting; for example: 30 minutes cardio (bike, run, step) and then 20 minutes of light, high rep weights.
During your second week flip flop the scenario: do 20 minutes of cardio, and 30 minutes of lifting, increase the weight slightly and decrease the reps slightly.
On the third week it's your choice - if you need to burn fat continue with cardio and weights. If you're thin and just want to gain size then go for the full one hour on weights.
On the fourth week you can start doing light dead lifts and squats - build up.