I’m pretty sure Cloudflare requires you to use their nameservers if you purchase a domain through them. So you would need to transfer your domain to another registrar first. I could be wrong though. I’m not an expert on this stuff and prefer to just use a dynamic DNS service instead of paying for a domain.

Fun fact:

“Jaywalking” as a crime was specifically invented to put the onus on pedestrians for pedestrian collisions.