Specific Extend brick background

[sp1290]

Hello! I'm looking for help to extend the white brick background in the attached photo to cover the skull, cactus, and artwork (basically want a clean background). I'll be zooming in on this for a headshot and will remove the drink/food by cropping, but do need the background clean!

Thank you in advance for your help

 

[psleon]

 

[JeffK]

As requested - can do additional edits if needed...

 

[Babine]

Another version ...

 

[kabak]

my try