Setup
You’ll need to have node.js installed to run the prototype kit.
If you are on a Macbook I’d recommend using homebrew as this will help with installing the other tools.
Once installed you can install node directly or use nvm - this allows you to switch versions of node.
I’d also recommend getting a github account and install git locally.
Once this is done you can create a prototype project with the following command in the terminal:
npx govuk-prototype-kit@latest create
Other links
The prototype kit has some more guided versions on getting set up