I'm also fairly new to the game, but from my experience, everybody here has got it right. Start with some books and websites, try to build a basic understanding of what you're getting into. Hacking and security can be a fairly wide subject, and it changes as new technologies become popular. Some of the books I started with are: Hacking for Dummies, Grey Hat Hacking, and I'm getting into The Art of Exploitation. Another book I enjoyed was The Art of Deception, as it sheds more light on a big side of hacking that other books only touch on lightly. Your knowledge of the target is equally as important as knowing how to exploit it. Building your knowledge of networking hardware, software, protocols, etc, will also help grasp how exploitation techniques. To Pen Test networks, you need to understand how they work. There is definitely a lot of work ahead, but in this field, there's always a lot more to know.