>>5136897This. There are many ways to learn to draw anatomy. I learned by mainly drawing from imagination, only using photo reference when I was stuck. Now, after many years, I'm finally getting interested in studying anatomical diagrams to polish my skill, now that I already have a good grasp of what a lively, attractive, not necessarily anatomically super correct character looks like.
Studying the diagrams before you are a fairly fluent character artist is not necessary. It could derail you too. Even if you become an absolute beast at the diagrams, you might not be any better as an artist than Proko.
