Any of them.

Usually, we tend to pick a rolling or semi-rolling releases like Fedora to have newest drivers.

Yes, it’s good, however you need to be more specific with your query for DDG to return good result.

If you’re interested in other privacy respecting search engines, there’s Searxng and Kagi (paid).

I honestly think that it doesn’t matter - this PWA is so polished I’m forgetting that I’m not using a native app.