Years ago I was owner painter of a custom body shop, Panit & Metal Arts,Torrance CAlifornia. My partner was an artist, I learned much from him. We could bring Corvettes back from the brink. An Expert is someone who used to be pert. We'll have to cut and grind away much of the damage.
I would apply fiberglass and matting from the rear to get all of the fractered pieces tied together. You need to establish a solid framework for deciding how to finish it.
RonJ
The fiber glass has made the hood firm again. Now the outside can be worked and shaped with plastic. First the broken ends are drawn together and stiched with fiberglass and a scale attached for accuracy.