@Slytacular
Studying anatomy is a very long process. Take your time with retopology. Look at these resources, maybe something will be useful to you.
https://anatomy4sculptors.com/art/
http://figuredrawingdotinfo.blogspot.com
https://www.youtube.com/playlist?list=PLLBuhtgnf8DLnlO62rJl5FcCOtKMp6mBf Online courses ( in Russian)
APD: Male Écorché
https://www.artstation.com/artwork/yYPK
https://www.artstation.com/artwork/A8ZdV