There is a lot to learn and while some of the experts who visit this board can tell you literally everything that is a lot to ask. To get a start, I suggest that you buy one of the starting videos (Hunter Specialties has a pretty good one called "So You Want to be a Turkey Hunter"
and learn some basics. Then you can come back here with some specific questions. After you get some basic knowledge you also need to hook up with your uncle or someone who has some experience and have them take you out in the field and teach you how to hunt turkeys (if you don't have someone to "show you the ropes" you can still learn but it will take a while). Turkey hunting is a great sport and very addicting. If you learn to do it right you will be hooked for life. Just ask the guys on this board.