A good place to start is on the Arizona Department of Real Estate Website:
You may have a different learning style then I do, but I like the in person classes. The goal of the real estate licensing classes is to help you pass the test.
You will really learn Real Estate once you start practicing. I would suggest that you speak with some of the brokers in town before you even get started. I would set up appointments with at least three different brokers. Find out how the system works and what they have to offer in terms of training and opportunities for after you are licensed. Learn about the compensation plans and the brokerages goals. There are many different ways to run a real estate business and you will want to find out as much as you can so that you can put together your unique business plan.