Feature post slideshow every page

Hi boyrobbie. Welcome to the Hueman forum. To use the theme flexslider you’d need to install a child theme (pretty easy) then modify the theme template files to display the slider. In my opinion, it’s much easier to use a plugin. Here are a couple that might work for you:
https://ww.wp.xz.cn/plugins/posts-slider/
https://ww.wp.xz.cn/plugins/wp-responsive-recent-post-slider/

It takes some amount of work. Here is a topic that discusses how the user added the slider to a static home page:
https://ww.wp.xz.cn/support/topic/flexslider-not-loading-after-upgrade