I am looking to learn how to take a photograph and add 3d furniture for Virtual Staging. I have looked and looked and haven’t found quite what I need. It shouldn’t be that hard I would think but it is proving very difficult for me to figure out. Any help would be appreciated! I would love to find someone who could just do a step by step or teach me how to do it 
[Addon] Camera matching add-on for modeling based on photographs or [Add-on] Camera Calibration using Perspective Views of Rectangles
or manual