I'd wait till your 22 or somewhere near. By the looks of your stats I would recommend to brows around and post your diet in the diet forum. It's amazing what a proper diet can do. Healthy clean diet + some cardio - you should drop bf in no time.

I'm no expert in your condition at lifting but you can give this a try: slow concentrated technique light'ish wight reps.

Good diet and proper exercise technique, you should be able to get to at least 200lbs 10% bf naturally. I wouldn't rush it. Creatine Glutamine BCAA's would be good for a start.