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
Did you follow the instructions the admin posted? You only get 24 hours after it was suspended or it gets suspended again.
https://community.x10hosting.com/threads/requesting-unsuspension.216503/