Switch MacBook Pro dark mode?

I watched a video on how to do that and read through a few pages but I do not have it with me somehow. Above should be so two small windows, where it says "Hell" / "dark" but I do not have. With me, I can only turn one on or off. "Use dark menu bar and dock". I can't do more and the menu bar is only dark, nothing else. (Pages, emails etc… Not at all) Can't I do that on my laptop?

Do you have the latest version of MacOS?

The dark fashion is included only from Mojave.

I do not have the version. Can I download it? I have not received any notification of a new version yet.

You can check the Mac App Stone there you can download the updates