I'm setting up a News page as my site blog, and I want it to have a different sidebar from the one already used on the rest of the site.
So far, I've managed to add a new widget area for my sidebar to the functions.php in the child theme, and I created a News page template for use by the News page that uses the new widget area.
The new sidebar now works great on my News page, but now I want that sidebar to also display (instead of the sidebar used by the rest of the site) on single posts, on post categories, and on post archive pages (eg slug 2017/05)
I'm struggling to understand the best way to do this without creating lots of templates and without affecting other parts of the site. I've looked at the template hierarchy, but it doesn't make enough sense to me at the moment.