Hi, I'm David an independent advisor and user just like you. I'll do my best to help you with this.
Windows is already automatically downloading updates unless you use the Pause option shown on your screen-shot to disable it for a time. I believe this has changed recently and there's no longer the "Choose how updates are installed" option.
I've just checked a couple of my own computers - and they both show the Advanced section exactly like your screenshot - and they definitely automatically download updates!
Regards,
David