How to Create Multiple Websites Using a Single Web Hosting Account https://youtu.be/KhOLz2AtQo0 shows how to add multiple domains to single web hosting account
In 2016 it is easy to add additional domains to a single web hosting account. Whether you are using CrazyDomains web hosting, GoDaddy, Hostgator or Siteground web hosting services, you can easily create and setup new domains using just a single web host account. To learn more about Managing Multiple Domains from a Single Hosting Account using CPanel visit:
https://blog.cpanel.com/managing-multiple-domains-from-a-single-cpanel-account/
For learning about How to Create Addon Domains in Cpanel visit RankYa Blog here:
https://www.rankya.com/how-to-create-addon-domains-in-cpanel/
To learn how to add WordPress on a subdomain watch this video tutorial by RankYa https://www.youtube.com/watch?v=c0yQHucyENk
Thank you for learning with RankYa