Wingless Dragon Muscle Structure practice

I've been trying to learn about dragon muscle structures from several examples, but even though some of them are good and helpful, I wanted to come up with my own, so that I can fully understand what it is that I draw. This is a wingless version of the surface atonamy and I will draw a better verion of a wingless dragon (this was just a doodle). I will also draw one with the wings, and maybe draw different poses.

About the drawing.
Sometimes, I like to start drawings using a ballpoint pen. I did the shading using a .9 mechanical pencil and blending stick.

I want your honest opinion. Does this look reasonable and functionable?

DO NOT USE WITHOUT MY PERMISSION!!!!!

Please Comment^^