Robins and Lloyd is an excellent school and they prepare you very well for the State exam. They are located on Silverspring in Milwaukee, but they have distant learning as well. I don't know what is available in Green Bay, but I would strongly advise that you have some kind of live training. You really get much more out of live class. The other way is to go directly through Wisconsin Department of Regulation and Licensing. They also have an online class and I believe it is less expensive.
You will definitely want to hook up with a company when beginning to work as an agent. A small company that is willing to take on an inexperienced agent and willing to train and show you the ropes would be best.
Hope this helps.