Windshyme

What scare me the most when it come to drawing humans is that I can't come up with a clear enough outline in my head of a body in a 3D space to base my sketch on. I try to figure out the right proportions and gesture from scratch but it doesn't usually work out well.
I'm sure there's better way to go about it.
I wish I had one of those T13 action figure so I could use it as a starting point reference, plus they look nice.
For the moment I'll just use pictures from other people's figurine instead.