Made this with Grafx2 + my mouse. Would like some critique, especially on the proportions & anatomy.
Here's a crit: When trying to learn the basics, use tools that are more effective than 'a bar of soap'.
Not to put too fine a point on it, if you are trying to learn basics like proportion and anatomy, you ought to be working with tools that let you draw effectively and quickly, so you can make, spot, and fix mistakes rapidly. If those tools != a tablet + paint program, then it's pencil and paper. A mouse, quite simply, is not a drawing tool.