2D and 3D room model for hanging art at real size

[pic from my webcam] This is my background, it directly, and almost evenly, faces a corner. I want to create a way of editing these walls in 3d space with 2d images of items and then viewing it from this view please. Please make it so i can upload images, with rough dimensions. In the meantime I will add some here to have in there. Then steered here: • add 4 items from [link to where I purchased the art] [list of items] please • 11.7 x 16.5 in roughly? • this is totally separate from the other things in this folder btw, a totally separate project • also 6 of these, true skateboard size please [link to where I purchased the art] [screenshot of the set] • green white orange light blue dark blue yellowish • no top right orange one, • I'm going to give you the exact dimensions from the camera to different parts of the room. From the camera to the corner of the room is about 12 feet 8 inches. From the camera to the light switches It's about 10 feet and from the camera. So the wall is about nine feet. [I actually read these out loud into the mic as I was measuring] • remove this please [screenshot of a hint bar] • this could be much smaller and optional please [screenshot of the card next to a selected piece] • option to hide ask claude please • allow drag and drop directly into the scene please