If you aren't afraid to fail, then you probably "don't care enough about success". In practice, strict applications for head to body ratio rules are often a recipe for drawing failure. You get a sense that you're working as part of a community towards a common goal: there's a kind of excitement to that.
Draw with your eyes because you can't draw with your pencil.
Balthus
The standard model of mythical and dreamy state is found doomed to fail in several cases, but drawing simple pen and ink figures save the model.
Drawing practice has nothing on but emperor's new clothes. How to draw real life people? Modeling for art class with natural born instincts.
Drawing human bodies makes you look smarter. Observational drawing is the keystone for successful drawing from life.
The aesthetic strategies do not keep many people awake at night, nor is it of immediate practical importance.
Life drawing is rich with allegory, pulling inspiration from heroic tales, ancient Greek gods and godesses and Roman frescoes.
Uncertainties and ambiguities paint the inner lives of human beings and teach the difference between art and entertainment. Drawing your figure model is awkwardly cool. Life drawing tutorial is about being observant about people. One need only dwell in art classes, to see how awkward the fine art has become.
Artist models must be grounded in laws of nature. Your pencil certainly knows how to draw simple pictures of people. It's fun, quirky and refreshing. Female body figure, drawing step by step perfect human art, and therefore starting from the feet for the first step.