React Native and IntelliJ

I have IntelliJ Ultimate edition and have followed the JetBrains doc to create the app. This doesn't seem to create anythink other than .idea and node_modules subdirs and a package.json file.  So there is nothing that it actually creates. I was under the impression that it would do the same as the command ‘npx create-react-app <app_name>’ where it creates a full framework with app.js, android folder, ios folder, etc. 

What is the best way to create a react-native hello world app so I can start using the product for learning react-native?  

I tried running the npx command thinking it would add to the app dir, but it issued an error since the dir already existed. I was going to run that command inside the app dir but that would only create another level below the one that IntelliJ created.  So at this point I am not sure how to move forward. Any help is very much appreciated.