If the specific 5.0 version has been rotated out of the active marketplace, you can often find the OVA images in the OpenNebula software archives.
Inside this directory, look for a file named similar to: opennebula sandbox 5.0 ova file download for windows 10
OpenNebula is an open-source platform for managing data center virtualisation and cloud computing. Version 5.0 (while older) is stable, lightweight, and perfect for learning core concepts like: If the specific 5
If you haven’t already, install Oracle VirtualBox from virtualbox.org . During installation, allow network adapters and USB controllers. Restart Windows 10 if prompted. the remains the best bet.
But for simplicity and offline practice, the remains the best bet.