Well, subdomains are URLs for different sections of your website. They use your main domain name and a prefix.
It's easy to create a sub-domain through cPanel:
1. Log in.
2. Go to "Domains".
3. Find and click the "Subdomains".
4. Choose a name for your subdomain and type it there.
5. Click "Create".
I hope it's helpful and you can do it!