What's your current bf%? I'd go 2 years natural straight in the gym to really learn how your body responds to things, get a good solid base, approach your natural potential, let your ligaments and tendons get stronger, and get your diet and workouts in good order. Also to make sure you're serious enough to start using AAS, and to do a lot of research in the mean time.
What are your current goals? I'm sure a lot of bros here will be willing to help with your diet and workout!