is it possible to get hacked by a hacker?

If you want to be a ... hacker, then in some way you're on your own. It's not the kind of thing you ask help to become, it's something you do extensive research to turn into. If you, like many other "kids" out there that go around asking for help on top of help to become a so called hacker, more often than not they turn into "Script kiddies" who think they are the best and whatnot. No. If you want to be a hacker you have to learn. You can't have things told to you in a succinct manner and hope to grasp everything. Start picking up those books, learn about IT networks, learn programming, learn how computers actually work... all that. Once you grasp the deeper concepts of all those things then you will start realizing where the exploitable holes are. If you'll either exploit those holes or help patch them up, well, I guess that's the moral line of it in some way. Still though, it's as you say: It takes a genius (or similar) to make an actual hacker, and not just being someone who can run a few scripts and programs that someone else wrote. If it's possible to be hacked by a hacker, maybe, not so much by those lil' wannabes though.

It is a difficult thing to become. There are persons you can call 'legal hackers'. Governments employ them, software companies also employ them to test how good their software is and so on. But before that you have to become a hacker. It requires a great in depth knowledge on computers, programming and networking. Even if you grasp all that it is not finished. Hackers have to be instinctive. Most of that comes from continuous study and rigorous training but like everything else it also requires talent. If you have it, you can do it. Best of luck.

There are what are known as "white hat" hackers. These are basically security consultants who test other peoples sites and systems for exploits and vulnerabilities.