To configure your domain to point to my server, you must create (or edit if they already exist) two DNS entries.  One is called an A Record for your domain and the other one is a CNAME Record that points www.yourdomain.com to the server.

A screenshot is included below which uses Njalla as the domain registrar.  If you're using a different registrar, the screens can vary somewhat but you are still putting in the same basic information.  You can typically use your favorite search engine to search for: "[registrar] create dns recrd" and that typically will lead you to an instructions page.  You can also reach out to us to verify you've done it correctly or have any other questions about it.

First record
Type: A
Name: @
TTL: Leave at default is typically fine
Content/IP Address: 185.107.80.18

Second record
Type: CNAME
Name: www
TTL: Leave at default is typically fine
Content/IP Address: @