How to use React-USWDS in your already-built website (headers, etc.)

[PhillipPowellTechAnax]

I created a React project in IntelliJ IDEA using create-react-app via npx create-react-app, and I have an already built index.html in /public, and I want to carve it into components that will be served by React components utilizing React-USWDS, but the online guides are way beyond my brain. Is there a super-simple tutorial or guide for simple folk like me to understand how to customize index.js, App.js, etc.js to serve up headers, menu bars, footers, nav bars, etc.?

Thanks