I would recomend NOT TOUCHING AAS (steroids) until you are in your mid twenties... YOU NEED DIET/TRAINING/REST... study these things and you will grow... If you do AAS while those 3 factors are lacking you will be very disapointed and run the risk of health problems because of ur lack of knowledge of pct etc... but since no one your age listens and it would be a waste to flame you I will give you this advice:
Go to a doctor and have him X-Ray your growth plates and determine if they are closed. If they are closed then you are done growing and AAS will have no effect, however if you are still growing 99% of steroids will close ur growth plates... If you are still hellbent and will risk stunting growth, Anavar actually increases growth hormones...