How to install new OS after a reset

Hi everyone

I just reset my MacBook because its storage was jam packed full.

I used the Erase Mac button using Command R because Erase Assistant wasn’t available for me.

However it can’t seem to access the server to reinstall macOS, I’m assuming because it’s outdated, the laptop is a MacBook Pro from 2018.

I want to install either the newest MacOS or at least Catalina because I need the EA app for the sims 3.

How can I install macOS from the command R screen after a reset?

Otherwise all I get is the blinking ? Folder with support.apple.com/mac/startup screen