I've put together this basic template for using the Netlify CMS within a NextJS project, along with TailwindCSS.
The Netlify CMS side of things is configured to create/read from JSON files rather than the MD files that their docs set you up with, as I find JSON far preferable to work with in this context than markdown.
Requires deploying with Netlify and configuring the project on their side once set up:
For help with this, head to the final part of this page in their docs: