Drawing a hot cartoon demon is a very interesting challenge! You can use any shape you want, you can add any detail you wish... the only limit is your imagination! There are no rules to create a perfect demon!
Therefore, you can use this tutorial to go a little further if you want! Once you have drawn this character, why not create one of your own? It could be interesting to see what you could come up with!
If you want to, you can also submit your drawing in the monster section of this site! It's a great opportunity to get feedback from other visitors!