This guide assumes you've already installed WordPress with Softaculous in your cPanel provided by GlowHost.
Find Softaculous within cPanel. Under Software, click on Softaculous Apps Installer.
Navigate to your list of installed apps. You can find this in the menu at the top right, it will say All Installations in a tool tip popup when hovering over it.
Click the Create Staging icon in the row where your WordPress website is shown.
You'll have several options here. Pay close attention since you should stage your website similarly to your live website. You'll choose the Protocol, Domain, Directory, and Database on this page.
Wait for your staged website to install. This won't take long.
Start testing! Your staging website will be active at the page address you've specified in Step 4 as soon as it shows complete on this page.