@tillianisafox I've been looking at doing the course at https://drawabox.com for a while, just to really drill in the drawing fundamentals. There is something of a hierarchy of skills that you need to develop and it seems like drawing courses in general have different ways of teaching them. But things like making clear marks and arranging forms in 3D space and perspective take precedence over human anatomy in any case.
I've been a bit sick though and haven't made much progress so far.