Please keep in mind im not good at art, never have been, but i like it so here is my attempt.
https://imgur.com/a/oaBaM
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Well you definitly have an understanding of the existing asset, but I would recommend adding your own flare to it. Add some variation to the ink, make some of it darker or lighter, highlight the different parts of the skull. You have the ability and the talent, but you need to challenge them. Keep up the good work. I look forward to seeing you progress