My little brother didn’t want me to post this

Context: I wanted a Bookmark for my new manga skeleton knight in another world, so I asked my lil brother who loves drawing much to make me one. obviously I asked for one with ponta (he's too cute 🤬), He was saying that his artwork was bad but I don't think so , he's def better that me 🤣 what do y'all think?

He drew it by looking at a picture as a reference , so idk if it's traced artwork or original 🤷‍♂️

P.s. He also wants some advice on how to improve