Could I get some advice for my art?

My art is pretty rubbish, I have no illusions about that, especially since I made the move to digital (less than a year so I'm still learning)

But would I be allowed to post a pic of one of my recent-ish pictures and get some advice on how to make it better?

EDIT:

Here's the link to the art on my instagram, please let me know if it doesn't work. I call her the Punk Pirate Doctor.