1
You need to solve proportions issues BEFORE  you start modeling, just do it  with paper and pencil until you get a "blueprint " to work with, then scan it and use it as the basis for your model.
   This means you´ll need a front view and a side view of your character. 
   You can find "human blueprints" in the web you can use as template, except that you know how to design your characters.
    

