Paperclip's installation is the same for new and existing projects. If you're using Paperclip for the first time, I'd recommend starting with a new project first so that you can get a good feel for the tool. It's super quick to set up.
To install Paperclip in an existing project,
cd into your project directory, then run:
This will install all of the necessary dependencies for Paperclip. After that, you'll need to manually configure your project. The next page will help you do that.
For new projects, just run:
You'll be asked some questions, then a new project will be generated for you. After that, just run:
Since you'll have a project that's already configured, you can skip the next page, and jump straight into Using With React.