Failed glass replacement, need to replace LCD?

Hi,

I followed the guide here (or so I thought) to replace the screen for my Samsung A50, but I took off more than the glass now this metal piece is still attached to the back. All I received to replace the screen that was cracked was a clear piece of glass, but I believe I tore off part of the LCD that is attached to the glass as well and after trying to turn it on again I have no display. Will purchasing a new LCD screen be sufficient to repair the phone at this point, and would I have to remove this metal sheet as well? Or did I mess it up to the point where the phone is worthless? The display cable also seems to have broke, since the glass/LCD/whatever I took off seemed to be connected to something but snapped off.

Thank you in advance, and I have two pictures below to further display what I’m talking about.

Phone with the glass on

Metal sheet I am referring to with the glass off