Before getting started with intensive practical exercises in CG, you need to learn a CG language first. I think OpenGL is the first choice.
In a word, I just finished reading the legendary “OpenGL Programming Guide 6th”, quite roughly. For this first time reading, all I need to know is what OGL can do, in the mean time, I can also know some basic senses about CG.
After the first reading, this book should be treated as a dictionary. I don’t need to spend a whole block of time on it, and I need to refine the understanding on OGL through many many exercises.
OK, another book has been in my hand now…
P.S. This book also helps me how to understand so called “languages” or “APIs”. Think out of the box: what does a language, or a set of API do? If clear, you should know what really matters..