Great job on your first bow. It only gets better from here on out. You'll notice significant improvement with each one you make.
As far as form goes, I prefer a wider stance with my knees bent more, but like many others have said, its a personal thing. The key points are to keep a consistent anchor, keep your drawing arm in line with the arrow, and don't lock any of your joints.
"Become the Arrow" by Byron Ferguson is a good book when it comes to addressing form. He breaks it down clearly and concisely, and leaves room for individual preference and different body types. I'd recommend that book any day of the week.
