Remix and add yourself to one of the sprites with costumes with boxes and remove the box. Easy: If you do it with a jumping sprite, you only need to add one costume. Advanced: If you do it with a walking sprite, you need to add more costumes, but you can animate it.
The projects, this is based on: "People generator": https://scratch.mit.edu/projects/108659735/ "add yourself to the street": https://scratch.mit.edu/projects/11842815/
