Why is my terminal not working on macOS? PATH variable maybe involved

I’m currently working on a Python project and I decided to uninstall and reinstall the version I needed due to some issues. I’m relatively new to programming and I think I may have uninstalled more than I bargained for.

In my (Mac) terminal, the commands python nor python3 work, and neither do other standard Terminal commands like ls, cd, sudo, nano, etc… which all worked before. My terminal is in zshell and it won’t even recognize the Zsh command. I am nervous I either deleted the system version of Python or somehow severely screwed up my PATH variable. I’ve done a lot of troubleshooting in the way of adding directories to the path and reinstalling Python again (lol), but nothing seems to be working. I will say I tried to open the ~/.zshrc file and edit the PATH from there, but without access to the sudo or nano commands, I’m really struggling to do so.