These guys have covered the basics. I'm just a few years older than you and started with the same goal in mind. Now that I've been doing it a little while I've learned a little bit. When you are first starting, don't worry about your abs. You will never get big if you don't eat a ton of food, and with eating comes some fat. If you focus on keeping a 6 pack, you won't see the results. You have to bust it day in and day out to get big. That's pretty much the biggest piece of advise I can give you. Worry about abs last. Now smash some weight!
Leaders are made, they are not born. They are made by hard effort, which is the price which all of us must pay to achieve any goal that is worthwhile. - Vince Lombardi