Do I have to take a course in school to be a good entrepreneur?
Good luck, and know that you will probably need to start a few businesses--or use the "buy, build and sell" model of buying a few underperforming businesses, building them up and selling them--before you find lasting success. Why? Because the real world experience of running a business is far better and incredibly more instructional than just theory. And the lessons also tend to stick a lot better.
All the best.