Mac seems like I won’t be able to use it again and it so discouraging, please I need help

I erase my MacBook Air and it started showing a flashy question Mark and I don’t know what else to do and I didn’t backup any file please can anyone help me.Here are the pictures of it so it can be understandable to the community.

first this is the only thing I can fine in my disk utility after erasing it

This is what I only see when I want to reinstall (the CEM is a name a gave to the partition disk from Apple SSD I.e the first one).

This is the hours it’s shows when it’s installing

This is what it shows at last