I find using the internet recovery has its good days and bad 😞 Apple tends to forget about updating it. And if you have a no longer supported system and OS version it uses forget it!
I would creat a bootable OS installer with the MacOS you are currently using, of course you need a working Mac to do that😩!
Get a 32GB thumb drive and try to hunt down a friend with a Mac to help you if you don’t have a second Mac.
Here’s the needed OS file [https://support.apple.com/en-us/HT211683|How to download and install macOS] and here’s how to make the bootable image [https://support.apple.com/en-us/HT201372|Create a bootable installer for macOS]