I'm sorry. I'm good friends with Mina (or at least used to be) and one of the things that she hated most was when people copied.
This isn't exactly copied, but next time at least choose a different palette.
Ifyou can't do pants, do a skirt; skirts are often easier to find a way to shade and it's good for learning how to do folds.
EDIT: IT is nearly completely copied.
Even if you repixelled it pixel by pixel it is totally completely copied when you look at it in paint, I only see a few pixels that are different.