How to close help buffer without moving to it?

I often use Emacs' help buffers, via e.g. C-h k.

Buffer *Help* is displayed in another window, and that window is not selected. In order to close the *Help* buffer, I need to switch windows via C-x o and then press q to close the *Help* buffer.

The solution of always opening the *Help* buffer in the current window, described here, almost works. But I would rather open the help in a different window.

Is it possible to close the *Help* buffer without moving to it, or to set it so that the cursor appears in the help buffer (which would mean I would just need to type q to exit)?