A sketch? THIS wonderful piece of work is a sketch? The awesome lines just blew me away. Such delicate and precise line work; the thin and bold edged just fit perfectly with the picture. The added texture made everything looks absolutely classy and nice. not to forget the awesome and intense eyes,oh, and also the flower at the head; amazing.
When you say there is something wrong with the anatomy, you were right. The odd angle of the table made it difficult to outline the prespective of the character. Maybe if you lowered the back end of the table (make the table less skew), the body especially the right hand can be properly drawn, so the hands wont be too small.
It really depends, usually can take 3-6 weeks, because i do this during my free time. Sketches is usually faster for me but sometimes i dont like to rush things bcause i wont be satisfied with the product.