Testimonials Problem

Hello, I can't figure out how to get the testimonials to show up like they do in the demo: https://catchthemes.com/demo/solid-construction-free/ I installed the essential content types plugin but there doesn't seem to be anywhere to input the person's position. The testimonials also don't show the person's name with the dividing line, only the content of the testimonial so it looks very plain. Is there a way to hide the "author" of each post? The author name shows up on every page, service, testimonial, etc...which doesn't make much sense for a company website. Why is this forum and theme hidden on your website? I installed the theme through WordPress theme search but can't find it listed anywhere on your website and in the forums unless I go to the URL directly.