For the purpose of this introductory course we kept the material brief and even still, you just learned a lot. But there is so much to learn about this topic. Van K. Tharp is considered the world authority on this topic, so when you are ready these resources are packed with more advanced material.
The Definitive Guide To Position Sizing Strategies
The Full Version of the Trading Simulation Profit Trainer
Introduction to Position Sizing Strategies
The Power of Position Sizing Home Study (comes with a free Definitive Guide text book)