Although not new to CG rendering theory, the advent of NODE programming proves itself as the more difficult way to achieve any given procedure, and not just in the CG genre.
And through diverse studies, I am noticing that there are certain procedures, that within Arnold, can only be done via NODES.
Therefore, I ask if there is any known training materials, videos, etc., dealing with Arnold NODE programming, at the complete novice level. From the ground up, for someone who has no NODE programming background.