As for question 1 - the graphic on that page is what you get when you click on the sun component, not what you get for just putting it in a card. Actually, it looks out of date too, because now you get the history as well.
I sure wish there was a comprehensive tutorial of sorts that would help new users to “connect the dots” so to speak between components, platforms, cards, entities etc etc.
And just when you think you’re making progress, the Phillips component/platform won’t configure
After several failed attempts to get the Hue to configure (hitting the Hue gateway button after the prompt - located down one flight of stairs) I copied an old phue.conf file into the root HA directory. And the next time I attempted the configuration it worked fine. Perhaps just coincidence of course :))