Bethy if you make a selection of the girl, cut and past that into a new layer. (Switch it off for now.)
Then in transform, stretch the base layer until only the grey of the background can be seen, taking the roll out by stretching it upwards.
I have left the crinkles in the background but these too could be taken out.
Now make an outsized selection of the distorted girl giving a clearance of a few pixels, feather it and fill it using content aware.
Switch the girl layer back on, move the girl down the page. Select the complete hand copy and past it into a new layer, flip it horizontally, resize it and move into place, clone over the thumb and shorten the index finger, tidy up and flatten.
If you have the hand in another picture use that.
You have no to editing ticked but as an edited version has been posted I will offer a small edit to better visualise my thinking.
If you have objections to my posting, I will take it down.
Rhodese.