The face and the general body posture looks nice, but I would say go grab a stick and make this pose in front of a mirror, I don't think you'll be able to see the back of the hand, instead you should see more of the front. You can turn your hand like that, but it feels very unnatural to when holding something. You might check a couple reference photos of swords, too, maybe a roman gladius as that sort of fits what you've done.