I found other topics regarding this problem but I am still very confused.
In my registrar panel I can change DNS but not nameserver.
Because of Cloudflare request a nameserver change to work, how can I do it, in this case?
I understand that maybe there is a possibility changing both DNS and IP address but in this case there are 2 problems:
1 - Cloudflare doesn’t give me the IP
2- Register.it would disallow all the services