I can relate to doing something for the first time, especially an organic figure. I’ve been working on my first organic creation ( a disco girl sculpt) for 2-3 weeks now and I just can’t get the anatomy right. It’s even more bothersome if you’re going off reference. Anyway, I’m not sure if you’re going off reference or you’re just letting the creative juices flow, but it looks like you’re going in the right direction to me. Maybe reduce the specular just a bit, it’s a bit shiny, unless it’s suppose to be a toy or something. If you want to go to that next level though, try to refine your character in Zbrush or Mudbox. I heard you can sculpt in blender as well, but I’ve never used blender before so don’t quote me on that.
Mudbox might be a better option though, since you can get the free student version or trial.
Anyway, really cool looking character.