My Mac won’t reinstall Software!!!

I was using MAC OS Catalina and liked it. I kept ignoring the updates, then went to bed with the power cord connected. I must have selected the option “try update tonight” because the next morning my computer started up and instead of an Apple Logo, I saw a Grey Screen with a Dark Grey Folder image with a “ ? “ - Ugggg it began. I headed to my phone and googled this on the APPLE SUPPORT Page.

I did the main reset option + command + r + i …. Nothing.

I then started up in recovery mode command + r and a globe appeared and loaded for about 15 minutes.

Then the Apple Logo! It loaded and opened the recovery page.

I ran the “first aide” on all Disks and all clean.

I Reinstalled…. “MAC OS El Capitan” ?!?! So weird THAT was what was available. 🤦🏻‍♀️

I tried to reinstall it and went through the setup and then came the time to “select a disk” …. But, guess what? No disk was available.

I called Apple Support and the same thing happened again.

Then I spoke to a tech manager and again… nothing.

no idea what is going on or if I can just wipe my entire computer and set it up with MAC OS Big Sur or another program, like MAC OS High Sierra???

Does anyone have some tips? Has anyone else seen this happen before?

Send help and save me from an Apple Tech Appointment and I’ll be forever grateful.

Thank you so much and I wish everyone that reads this a beautiful day today.

Thanks so much,

Jen