React Bricks has a starter for Next.js with a blog, with Tailwind CSS.
The best way would be to scaffold a new project with the CLI (npx create-reactbricks-app) and then copy and paste the part you need into your Next.js project (you will need the .env file, the react-bricks folder, the admin folder and the catch all slug page).
or some other CMS
Research
https://www.reddit.com/r/nextjs/comments/15qbbuu/adding_blog_to_existing_project/
https://www.reactbricks.com/