Ongezellig

Probably look up a vector/sketch image of the pose you want and draw Mymy over it, the vector image has to have a similar anatomy to Mymy for it to work, meaning cartoony and not realistic.

Drawing is such a fucking pain in the ass I would say just go on civitai, learn how to prompt correctly and be a reject of drawfag aryanheaven like me, but if you're really motivated and ready to spent hours and hours of your free time doing this start with the basics: Anatomy, Shading and Sketching (ASS for short).

You can start by tracing some screenshots of the show if you want to inmerse yourself in the anatomy and components of the characters, you will reach a point in which you will be able to draw them from scratch without any reference, but that is the last step, start tracing and don't feel guilty about it.

Hope this helps, zaryan.