Iam making recreating this picture of myn but in pixels

any who iam doing a heelflip (skateboard trick board rotates) above 4 sets (staircases) now Iam finnishing the character (me) and the skateboard first before I head onto the scene now I really need to pop out the character I think what Iv got right so far Is the tank top the vans shoes the skateboard and slightly the head , iam struggling with the pants shading

any help is greatly appreciated thanks <3

2nd edit:

also once I feel that the character is finnished ill start working on the background