Not bad, in fact I like where you went with the blood.
The thing that bugs me is the shading under the hair on the head, particularly to her left side of the head where the shading is going above the hair and not simply under it (if that makes any sense) and how the hands are holding the gun. I get hands are hard to draw but I would have used some references to pull this one off if you ask me.
But, regardless it's still pretty good in certain regards and I think that over time you'll be able to master your craft to the next level, but you got to be mindful of how you go about shading your work because I think that's your biggest challenge right now.