The semester is coming to an end and I gotta do my final project for my Drawing 1 class.
It's we can do anything as long as we use a reference.
Since I am somewhat interested in drawing people I thought I would look into drawing some anatomy.
I was thinking something like this (The Pose).

But should I just draw it from the waist up or the whole body ?
And I still haven't found a decent reference picture so I would appreciate any help here :)
I'll probably do this in pencil and on 18x24 paper.

TL;DR I need a good anatomy reference pic.