What controls the display of the other pages on my site http://wp1.testing.hallettcovebaptist.com/ eg Sermons and Church Events. Sermons is a plain page with text and links in it and Church Events is a category displaying everything in that category.
I am not exactly sure what the issue is here. Each page has to be created and populated with content. The page can have any kind of information in it but the categories can be used to organize the pages.
That is a category page so the only way to edit that is to change the template using php, you enlist the aid of a developer to do this: https://colorlib.com/out/envatostudio