Need help with picking wallpaper

Hi everyone,

I did the black accent wall and now can't decide on paint color or wallpaper for the rest of the walls. Initially, I thought about doing the black and gold wallpaper, but I think something similar to the last two pictures will go well.I do have black velvet curtains for the window and want to hang a big art piece on the opposite wall. Also, which mirror and lamp combo looks good? Thank you for any tips and suggestions.