How to add CDN to subdomain containing websites

I bought a free hosting service on infinityfree hosting company and I also registered a free domain with a subdomain ( techyramu.epizy.com ), when I came to add cloudfare CDN to my website, im unable to add CDN to my website, so please refer me a solution t solve this problem

https://community.cloudflare.com/search?q=epizy

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