It's one thing to get an old beater like I did and give it a shot. It's another to use what the OP decribed as his dream camera to learn on. Get your "dream camera" repaired and done right by a professional. Then go shoot with it and fulfill your dream. If you want to learn how to repair cameras then either research how to do it, get the right tools, and make it happen. Or if you're just curious then get a beater like I did and give it a shot in your spare time with whatever tools you have lyiing around.