Firstly you’d have register for an Cloudflare account, therefore add your naked-domain aquilbiz.com to it and change your domain namesesrvers at your domain registrar.
Upon that, you’d have to double-check the DNS records and add or edit the existing ones.
In case it’s missing or not resolving, I’d suggest you to add a sub-domain related DNS record to the DNS tab of Cloudflare dashboard for your domain by following the step-by-step instructions from the article below:
I’d manually add them to the DNS tab of Cloudflare dashboard, the ones which you see in the cPanel DNS Zone Editor.
Make sure to have a valid SSL certificate for that sub-domain before adding it to the Cloudflare.