Art for my friend

Finally, my session is over, unfortunately I have one triple in higher mathematics due to a biased teacher.. But this is a completely different story. 😔
And so, finally I completed the art for my friend, which I wanted to draw back in September, but something went wrong😅
I now understand that in order to grow my skills and improve my drawings, I need to re-study composition, anatomy, perspective, as well as work with gradients, effects, light and shadow. It seems that I will have to do this during the New Year holidays 😤✊