I'm trying to set up my zsh terminal environment on my M2 MacBook Air

I prefer using Oh-my-zsh. It will set up the completion correctly, and add a lot of capability which is fully customizable.

Sounds like you don't have the proper path variable configured. I don't use zsh, so I cannot advise on that, but it is usually best to put the full path to any commands into your shell configuration files and regular scripts so you know you exactly which version of the utility you are accessing since it is possible to have versions installed from other sources. Best to have it pointing directly your default installed system utilities unless you need to use a customized version.