>>7721370 (OP)
Genuinely, attempt and try all of them. Do Vilppu's gesture and figure drawings, do Steven Huston's, do Michael Hampton's, do chink's and gook's methods (like Rockhe Kim, Krenz or KJG), also do extremely slow and detailed anatomical studies from the likes of Scott Eaton, and Gottfried Bam, and last but not least do 3d sculptures.
All of them combined is the best method, they all describe in their own way the human form, consciously, and subconsciously, you will learn a very detailed knowledge, but at the same time abstract, of the human form which will allow you to simplify and modify the form as you want.
Obsess over it is my best advice, embrace your obsession. There is no "easy way", the best way is the most deranged way.
There is no specific course, or method that will give you the answer you wish for, the answer is all of them, to their extreme, at the same time.