Realistic Photo Editing: Holding a Square

I need a highly realistic photo edit where it appears I'm holding a blank square in my hand. The original photo is taken indoors, and the background is an indoor scene. The purpose of this edit is for personal use.

Ideal Skills:
- Professional photo editing experience
- Proficient in photo manipulation software
- Able to create highly realistic edits

Please bid if you're able to deliver a high-quality edit.