Hi, Zheer,
I’d say, https://cgcookie.com/courses/creature-modeling-for-production
Of course, you can skip the Sculpting part.
Also, have a look at the Baking Course, when you’ve finished the Retopology: https://cgcookie.com/courses/bake-texture-baking-with-blender
This is mostly concentrated on Normal Map Baking, but it will help you understand the process.
