Zsh is something I would encourage everyone (who uses terminals) to try. It has a lot of customisations, plugins and themes. Oh My Zsh is a framework for Zsh that makes it easier to add plugins. I would suggest install Zsh using Oh My Zsh. There are a few plugins that I install to provide auto completion on my shell, vim customisations I like to use. I would suggest to following guide to wow everyone with your terminal https://medium.com/@jeantimex/how-to-configure-iterm2-and-vim-like-a-pro-on-macos-e303d25d5b5c