What steps to do after buying a new dedicated server hosting?

Hey, I have bought a new dedicated server. What steps I need to do to change everyone in my Cloudflare, I’m not a technical guy kindly explain me what to do. I contacted the hosting company they said changing the IP addresses would resolve it. Is it? Kindly tell me

That’s pretty much it. There may be some unforeseen loose ends. If so, then let us know.