Sometimes when people look over my shoulder, they ask ‘What are you using? It doesn’t look like iTerm2.’ Here’s how I did it:

Install core

Install brew and then wezterm via brew install --cask wezterm
Install zsh via brew install zsh and Oh My Zsh via curl sh -c "$(curl -fsSL https://raw.githubusercontent.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"

Install plugins.

autosuggesions plugin

git clone https://github.com/zsh-users/zsh-autosuggestions.git $ZSH_CUSTOM/plugins/zsh-autosuggestions
zsh-syntax-highlighting plugin

git clone https://github.com/zsh-users/zsh-syntax-highlighting.git $ZSH_CUSTOM/plugins/zsh-syntax-highlighting
zsh-fast-syntax-highlighting plugin

git clone https://github.com/zdharma-continuum/fast-syntax-highlighting.git ${ZSH_CUSTOM:-$HOME/.oh-my-zsh/custom}/plugins/fast-syntax-highlighting
zsh-autocomplete plugin

git clone --depth 1 -- https://github.com/marlonrichert/zsh-autocomplete.git $ZSH_CUSTOM/plugins/zsh-autocomplete

Open .zshrc

nvim ~/.zshrc
Find the line which says plugins=(git).
Replace that line with plugins=(git zsh-autosuggestions zsh-syntax-highlighting fast-syntax-highlighting zsh-autocomplete)

Enjoy!