Says my domain is not yet active on Cloudflare

Hi, I’m new here. I have my hosting with Hostinger and I’m using Zoho One as my CRM. For some reason, my MX records kept reverting back to the Hostinger name servers and therefore my email would go down. So the tech suggested I go through Cloudflare. I have configured everything, but now it says your domain is not yet active on Cloudflare. How do I get it active? Sorry if this is a stupid question.

what is the domain name? example dot com is fine