OK, it seems to work. I can, at least, pin apps to the taskbar and copy and paste images and files to the Desktop. I can't see the Libraries, but I think (?) I can live without them for now.Yes, pretty much.
BUT...do NOT do this without a know good full drive Image of your current C drive.
It is very easy to make a mistake, and have the whole thing go away.
Try that partition shrinkage on your D drive first.