PowerVR ES Emulator with the beginers

Hi every body,
I have just start learning about PowerVR ES Emulator, Glut/es and the related things. I really want to see more about this. However, I get some problems when finding the suitable documentations, the concepts to understand. Therefor, I really want to receive the useful advices and experiences from every one in the forum. Thanks so much and sorry for my poor English.