I tried to update my computer and now my Mac can’t find its SSD.

I tried to update my old MacBook to MacOS Monterey, as I wasn’t sure if it could handle Sequia, however when I turned it back on it says the computer has no storage, only showing a folder with a question mark on it. I have no idea how to fix it, and I can’t open anything on the computer

any help would be appreciated

Author: @SliderTheAmazing