coho, totally understand the desire to start cranking away to achieve your goals, that's why you're here asking questions, and you should continue to ask. BUT, as you see from the numerous replies, you really need to build a solid base and give your body time to catch up to itself. At 16, 17, 18, 19, I took every supplement under the sun and screwed around with dbol at 17, jacked up my knees a bit as my growth plate became a little warped.
Slobber is right on, focus on your form, technique, drive and diet. Plus, keeping reading these boards for nutrition and training advice. You'll be so far ahead of the game by the time you're ready to hit AAS, you'll have an advantage over damn near anyone.
Just be patient bro. Enjoy your natural gains because you've got substantial growth ahead of you. It's not a race, it's a lifestyle.