'Error found in terminal, unable to find my atom code

I'm pretty new to coding with the use of python, atom, and windows (in the past). I recently just changed to a Macbook and came across this error while trying to view my code. I understand that there are some threads that are similar to this but I can't seem to understand what is PATH, etc.

Is there anyone who can guide me on this? Would appreciate your help a lot. thank you!

Error received: "zsh: command not found: "



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