I transfer my domain register from hostinger to cloudflare, how I set up nameserver in cloudflare domainregister

My domain is https://examportal.xyz. and Recently I transfer my domain from hostinger to cloudflare register but my site is not open. The message show Error 522

Ray ID: 60184172ef212e33 • 2020-12-14 13:26:17 UTC

Connection timed out

How I change nameserver in cloudflare register.
Can any help me

A 522 error typically happens when Cloudflare requests to the origin (your webserver) get blocked. Review the suggestions in this Community Tip for troubleshooting ideas.