You will need to obtain the SSL Certificate through the hosting control panel:
Account Manager > SSL Certificates > Get automatic certificate from ACME Provider
In Hosting Control Panel:
Account Manager > Domain Setup > Click on vhippel.x10.network > Check the box for Secure SSL > Modify
Account Manager > SSL Certificates > Get automatic certificate from ACME Provider
As this is a web hosting service, just using a domain for DNS and email service, could be considered misuse of the service.
Free subdomains are not compatible with Cloudflare