My first 'commission'

My mum saw my drawings and she was surprised that I could draw, well, anything, and she asked me to draw a ballerina to accompany some ballet tickets she was sending as a gift.  I felt that was a tall order but thought I would give it a go.  I searched the net to find one I could use as a guide and came up with the image below.  I've been using the Zig Artist Sketching Pen in all of my ink line drawings to date which is a Japanese product.  I picked an image where I didn't have to draw the face as that's too difficult for me at this stage.