Finally, create the last new layer above all the other layer set to soft light at 100% opacity. Take the brush tool (B) for the last time. Choose a very soft round brush set at about 10% opacity to paint soft white highlights around the floor indicated by orange arrows. Name this layer soft white.
While we are still active on the soft white layer which is the topmost layer in the layer panel, hit Shift+Ctrl+Alt+A to stamp all visible layers into a single layer. Name this new layer final result. Go to filter > sharpen > unsharp mask. This filter will sharpen the image a bit.