It looks nice from what we can see of the 1 picture. I'm not criticizing your work. You are the best person to do that. I would suggest taking particular note of the mistakes that you know of that you made (we all do) that either led you to make another (like taking too much wood off in areas as an example that became uncorrectable later on) and the mistakes that you didn't spot until it was too late (not modifying a part before inletting for instance). Take note of the remedies too.
Some people are very comfortable and go slowly enough that their first build is suitable for presentation at the Royal Court at Versailles, but most of us grow our skills more slowly, gun by gun; plain gun first, then adding features on subsequent ones as your confidence grows; inlays, scratch made muzzle caps, patch boxes, pipes, wedges, carving, engraving, sights etc. You get the picture.