RE: Need sum help
Weight Training will NOT stunt your growth, repeat, Weight training with not stunt your growth.
Help - If you are new to weight training i would start with push ups, chin ups, sit ups, and body weight squats. Do these 4 movements 2-3 days a week. Running, swimming, or playing sports of some kind 2-3 days a week will also benefit you.
Try this for the weights...
Pushups - 3 sets of 5
Chin ups - 3 sets as many as possible
Body wgt squats 3 sets of 20
Sit ups - 3 sets of 10
Start with these reps and each week try to increase the reps each set of each exercise. These movements along with other activities like mentioned about will help strengthen your connective tissue so you will be ready to weight train later and handle heavier weights.