Removing domain from Cloudflare - missing steps?

I had a domain set up with Cloudflare for a redirect that I no longer require.

I deleted the website from my Clourflare account and changed it’s Nameservers back to it’s local host ones, but the site is not working and error message is; DNS_PROBE_FINISHED_NXDOMAIN

I hope someone can help me step though how to fix this ASAP in human language please!

Some records will be missing in your new/old nameservers. You’ll need to add them, but that’s something you either have to do yourself or a question for your host. Cloudflare is not involved at this point any more.

OK thank you. That is helpful as gives me some direction.