I am taking another go at learning anatomy (previously submitted the tracing part, tho i redid those aswell), however i am having a lot of difficulties with basically everything since i am verry new to drawing in general (like thinking about 3d shapes and rotating them in my head. and proportions, tho i think in the future for stuff like this i should draw a outline first since that i can at least compare to the picture). but different from all my other troubles with this exercise is finding the spine and such under the skin. even with tracing i have no idea how things go. attached image shows my first attempt at drawing this (to the right), but besides the obvious proportion errors like the spine being way too long and not bending right. i have no idea how well it is otherwise since i lack the skill to know what it's actually supposed to look like, tried tracing on the left but there is just not enough places where the skeleton is visible under the skin to guide me. is there more resources to help me figure this out somewhere? preferably free since after being sick for 5 years and now a student, every expense is going into student loans.