I find you really hard on Windy, especially if you've been using it for so many years!
The FAQ presents simple questions even if sometimes they give rise to discussions. Just ignore these discussion threads.
To answer your very basic questions, click a location on the map then on the amber arrow to get the different meteograms at this location.
Then to see the 10-day forecast swipe the meteogram panel to the left.

And may be your question about the screen display management can find some light with this good summary from a Windy user @mhaberler