@Titchwitch
Here are Oncord's full go-live instructions for reference:
https://www.oncord.com/resources/learning/tutorials/settings-and-config/going-live/
Assuming you've already registered a domain name - The company you registered your domain name with will provide a portal that allows you to change the "name servers" that your domain is set to use.
If you're having trouble making this change - I'd say hit up their support team, and they'll be able to assist you.
