they are crazy expensive haha! i used apoxie sculpt due to it being a bit stronger and waterproof along with an air dry 20+ hour working time (became really handy when making my axe) great for props because you can always work on one part then leave it and come back a few hours later to fix it and not worry about having to be perfect right away.
The cosplay looks good. Compositionally, however, the photo is lacking. There is very little contrast between colors and the subject (you) is framed very oddly. Also the fact that I can see the remote release takes away from the fiction of it. Also your body language doesn't really fit the character or look realistic. You look like you are trying to pose for a picture but without looking at the camera and that gives off an awkwardness that really doesn't belong in a shot like this. I do think you nailed the costume pretty well though.