That's a fine start Dan, good job! The only thing I'd do different on the design would be to move the "loop" up to where the trigger guard ties in. As for the fit and finish, you did well for a newbie. Even stitching with the awl stabs not quite so steep and a more finished edge are things you could work on, but they are things all of us continually work on
Enjoy the new addiction, er, um hobby...
Josh