Welcome to the Cloudflare Community. You will find plenty of relevant #tutorial entries in the Community. The official documentaion is another excellent source of information.
I am not aware, but as far as I know, Cloudflare for cPanel “integration” support is a bit deprecated and on most cPanel servers, if you have “Cloudflare” icon, I am afraid it might not work.
However, I’d suggest you to add your domain to your Cloudflare account, therefore configure the DNS records as same as they are on the cPanel DNS Zone.
As you’ve registered a domain with Cloudflare Registrar, you need to make sure you have the needed DNS records at the DNS tab of Cloudflare dashboard pointed to your web hosting/server/origin host IP and others.