We'll create fresh WordPress site with Sticky Header On Scroll installed. You have 20 minutes to test the plugin after that site we'll be deleted.
Easy installation one-click plugin for your WordPress website. To make your header sticky when scrolled, you need to add main header class(or id) into the plugin input. You can also add any color of your choice when the header is sticky.
There is another option where you can display scroll to top button in the front-end of the website.