Also how do i add images like some threads have id like to add my home project for reference

What do you mean by "add images"? You can set the texture of a side of a box with a screenshot but I don't think that is what you have in mind. Paintings are created that way: a thin box with one side textured with the painting image.

In this thread adding external images is discussed but that is currently not available in Sweet Home 3D.