I am new. How do I install themes on my Nintendo Switch?

Follow this order:

1. Mod your Switch first using the Nintendo Homebrew Guide.
2. Make sure your Switch is connected to the internet, with possible protections like 90DNS in place.
3. Install the NXThemes Installer and Themezer-NX.
4. Find a theme you like on themezer.net, and:
   • NXThemes Installer: go to the Download themes tab and fill in the Quick ID in the ID box, or
   • Themezer-NX: click the Install by Quick ID button on the launch screen, + to exit the app.
5. Follow the steps and enjoy!