We seem to be in a really similar point in the lessons at the moment. I too was kind of wondering why the dynamic torso / pelvis wasn't addressed. I'm assuming it comes later as well. In that case just block out the area where it would be like you are and focus on the limbs.
As far as proportions go, just keep at it. That one looks pretty solid. If you're worried about getting the shapes right, you could do it twice a day. The first time you do it, keep the video still up as a reference to check against your shapes, and the second time do it with no reference up until you get to a place you're happy with.
Or do it once and just keep the reference up and try to ignore it, only checking when you aren't happy with the shapes until you can do it without looking?
Keep up the great work!
