Background help

[meat]

Composition doesn't have to be deep perspective. Since the main subject is already pressed up against the view frame being the foreground, this piece might benefit from a flat, graphics design like background. With the same metal bar division, it could be a flat wall with warm light to cool shadows, letting you use complimentary colors, then have a giant poster that's equally cut off and only partially in view, just like your subject. You can also have off-screen hanging wall decorations casting a shadow into the camera frame. If you want the main subject to not be the foreground pressed up against the view frame, you can have shapes crossing the frame as if we're seeing him through a window that has decoration hanging across it.