record overlay for a good morph with actor

Should I make this work: from an old black and white photos in which there are different characters, each of these comes to life. Since you’ll have to do the shoot on green screen and some of the work of composintig with blender, I was wondering if anyone knew how to make a kind of ovrlay between the character in the picture and that of the upturn (which will be very similar). Maybe a software or perhaps a system in rirpesa. It is short, to place the actor esattemente as the pesonaggio in the photo but do not know how to have a reference in overlay