Go to your panel (e.g. cPanel's URL will be https://domain.com:2083) and log in with your details.
There click on the Softaculous Icon or Link.
The Softaculous Enduser Panel will be displayed.
On the left side, you will find some categories of Scripts.
Choose a script from it.
We are installing Joomla, which belongs to the category, CMS.
The Script details will appear with various details like ratings, reviews, demo URL, etc.
Fill in the Installation Details
Click on the Install Tab.
Choose the script version
Choose the desired script version from the drop-down.
Fill in the details like domain name, protocols, admin, admin password, etc.
Click Install
Click on install and this should do the trick. Installation time may vary in accordance with the size of the script and other factors, so please be patient.
Click on the Links provided by Softaculous after the installation is over.
This should redirect you directly to the Site page or the admin homepage.