Depending on where you are the things you'll need prior to first solo may be different. Most places require at least a Class 2 medical certificate and you have to be at least 17 years old. You are best off asking the flying school about this. As you are hoping to work as a professional pilot though I would recommend doing a class 1 medical if you can. The more you study before hand the better, just make sure you go into the lessons with an open mind and don't think that you know everything just because you've read the PHAK.