1- Create your Chamilo 1-Click App and when running, visit in a browser, e.g., http://your_vm_IP
2- Connect as admin using the default credentials: admin / Truevision
3- Change your password and other details by going to the right drop-down user menu, clicking on the admin username, then clicking on the pencil icon under the user picture.
4- To change the URL/domain, just point your DNS to the server IP of this new VM
5- To reconfigure with HTTPS, simply use the guide on setting up HTTPS with Letsencrypt on Ubuntu and ensure your Apache VirtualHost continues to point to /var/www/chamilo/www/
6- You can learn more about using Chamilo at https://docs.chamilo.org/