Wasp Installation error: export PATH $PATH into file - I can't get it to work.

Hi folks, I have pasted the line from the terminal into each folder individually, at the starts and ends of the files, one by one and nothing is working. I have also created new files that weren't there and that didn't work either. I had to create /.bash_profile, /.zshrc and /.bash_login and try it that way but unfortunately I am still stuck.

I am on Linux Debian on ChromeOS. with nvm and Node.js all installed correctly and working.

I have browsed StackOverflow etc. for hours trying all sorts of solutions already as well.

Any help would be greatly appreciated, please!