Make some edge loops for the face to build up some functional structure and you'll see some big improvements overall I'd bet. The mouth area especially would benefit from it. You have some very human noses on both versions, and the nose is notable for being the part of the face that really brings it all together so to speak. I suspect you would achieve a much more alien and less "uncanny valley" look with a more alien nose to suit the rest of the face.
Overall mighty impressive for a first shot.