Stage WordPress Website with Softaculous – cPanel

Login to cPanel.
Tutorial: login from the Client Area or the direct link.

Find the Domains section and click the Subdomains link.

Subdomain
— type the name of the subdomain you want to create in the Subdomain text box / staging 
Domain
— choose the domain name you wish to create a subdomain for from this drop-down menu.
Document Root
cPanel automatically fills in the document root path by using the subdomain name you’ve entered. This path is where the subdomain’s files are stored. If you want to store the subdomain’s files in another directory, enter the full path in the Document Root text box.
Click the Create button.

Go to cPanel Home.
Find the Security section and click the Let’s Encrypt SSL link.

Issue a new certificate
In the Domain list, find the Subdomain you’ve created and Click the +Issue button.

Select all the options and click the Issue button.

Go to cPanel Home.
Find the Software section and click the Softaculous Apps Installer link.
Click the Installations purple button.
or
Click the third icon Installations in the top Task Bar.

Click the Backup Third Icon next to the chosen WordPress installation.

Backup Directory
– Check this box to backup the entire WordPress folder
Backup Database
– Check this box to backup the database
Backup Note
– Leave a note if you need to. Like when you are doing backup before the staging process.
Backup Location
– Choose the option from the drop-down menu

Click the Installations purple button.
or
Click the third icon Installations in the top Task Bar.

Click the Create Staging First Icon next to the chosen WordPress installation.

Staging Installation details
Choose Installation URL
Choose the domain/subdomain you wish to install the Staging WordPress.

In the In Directory field, you can specify the root folder for a WordPress installation. 
By default, this field is empty, and it allows installing WordPress on yourdomain.com directly.
If you wish to install it to a subfolder, like yourdomain.com/blog, simply type “blog” in this field.

– Disable Search Engine Visibility – probably best to check this option If you are only using installation for testing
– Site Name – optional
Click the Create Staging button.

You will see the success message as shown in the screenshot below when the installation is completed.
Access the WordPress admin panel and/or WordPress site.