You'll need to make this adjustment in the account you've purchased your domain name through. Every registrar is different, therefore, to change your name servers for your registrar, you may need to reach out for their support article on how to make this adjustment within their interface.
Websites setup before April 22nd, 2019 (Website 1.0) will need to change your current name server to:
Once you’ve changed your name server, it may take up to 72 hours for your DNS to propagate. We recommend that changes to nameservers (DNS) be made Friday evenings to allow for the propagation to take place over the weekend. Note: Changing Name Servers will make it so that VCG will host both your website and emails ending with your domain name. You will want to ensure you've backed up any necessary emails prior to this switch. If you'd like to know how you can have VCG host your website only, and not your emails, click here. If you have questions on how to change your Name Server within another registrar, please view their support guide on the article, as the exact steps will differ depending on the registrar.