Your domain is showing a GoDaddy parking page, so something is messed up on your end. The domain may not be registered, so check that.
If you are going to use CloudFlare, you first need to add the domain to your InfinityFree account, which means the nameservers must be set to ns1.epizy.com and ns2.epizy.com. Then, once that is done, you can add you domain to CloudFlare, following the guide by Greenreader9.