First login to DirectAdmin, then click on Installatron Application Installer, then click on WordPress (under Content Management), and then click the + install this application button.
You will be prompted to enter some information. First you will need to choose which Domain to use (we recommend selecting a domain beginning with https://). If want to install WordPress to the root of your web site, keep the Directory field blank, otherwise specify a folder name for this field.
Next scroll down to the Settings area and choose a username and password for your WordPress admin area. Finally, you can scroll to the bottom and click the Install button.
After WordPress installs you will be provided with to links, one to the WordPress site that users will see, and one to the admin side used to administrate the site. Please make note of these links for future reference.
You can refer to the WordPress Quick Start Guide for information on creating content, styling your site, and adding additional features using plugins.