HEY! this is my first post on poly count. new to the site

i want your peoples input on my work. so for starters. im working on a Pinky Demon. YOU MUST KNOW that i WANT this to be photo realistic as possible. BUT im having a hard time with anatomy sculpting. i can do an "OK" job when i work on humans. buut when i get to monsters or demons..its like i have no clue where muscles would be formed and connected. here are a few images (mostly a rough sculpt)

so yeah its a rough sculpt. nothing to interesting. really only used the claytubes and the move brushes. to kinda form anatomy. but again im not sure if this even looks ok. because obviously theirs no real pinkys to reference. so maybe you guys know the best way to form his muscles. im mostly concerned about his legs and his butt. so some input from everyone on that would be great. also the topology isnt good. il have to retopologize him after hes done. DONT WORRY BOUT HIS TEETH AND EYES AND CLAWS!
so please if it sucks tell me. but give me help lol. really could use it. thanks!