This is a great start. If you want to become more refined do a LOT of studies of human/animal anatomy, portraits, and places. This will break your fears of drawing certain subjects. Also, remember when it comes to drawing ALWAYS work light to dark this will allow you to produce a correct base sketch before you add your bells and whistles. Think of it like building a house. Your sketch (light) is your foundation/blueprints and THEN you add your drywall, brick, piping, etc. Hope this helps and great start. :)