I've been doing major research on AAS but I really don't know what kind to get. I want injectable to keep my organs safe as possible. Looking at the rating charts and what people are saying, deca seems like the best option. I'm 18, 6 feet tall and weigh 168 lbs. Is this what I should do my first cycle with?
Don't use any anabolics at all, yet. You're still really young and your natural Test levels are the highest their ever going to be. You can make great gains, naturally, by just getting serious about your diet and training. As Magnus said, 6' 168 lbs is still pretty underdeveloped. You've got a long way to go before you have any reason to start using AAS.
You'll get good direction on this board from guys that have been in the game for a long time and understand the reality of steroid use. It's not to be taken lightly. The side defects from some of these hormones can be difficult to live with, and in some cases permanent. No one is trying to scare you, just to provide you with a realistic perspective gained through years of experience. I know it's not the answer you wanted to hear, but it's the truth.
Head over to the Diet and Training forums and start some posts asking for direction on both subjects. You'll get some great advice from some of the smartest guys on the net, and with some seriously hard work on your part, you'll be able to achieve your goals.