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Then WordPress. First the hosted version, then the self-hosted version. This is easy to get started with, and leaves many doors open in the future, if you want to expand, extend, self-host or migrate.

Then go for https://demo.bludit.com/. Absolute simplest and nicest CMS outhere

Why would you ask for something written in a stack you know if you don't want to host it yourself?

There are free hosting options for Jamstack sites so I think the question is what's the benefit of hosting it yourself vs using a free hosting provider e.g. for Next.js using Vercel ?

ummm..you asked the question :)

shouldn't you know what it's about? :)