Error "no bootable medium found" when using MacBook Air M3 VirtualBox.

[Brem]

Hello, I am a MacBook Air M3 user. I will be taking a course on Linux in the coming days, and the instructor has requested us to use VirtualBox. My issue is that I downloaded the VirtualBox (macOS/arm64 dev Preview 7.0.X 164379) (also tried 7.0.8) version. However, I am unable to install Ubuntu or Debian files (ISO) on it. When I try to install, either the BIOS screen appears and then goes blank when I press download, or it displays "no bootable medium found", or "the Virtual machine failed to boot. That might be caused by a missing operating System or misconfigured boot order. Mounting an operating System install DVD might solve this problem. Selecting an ISO file will attempt to Mount it after the diyalog is closed." I am getting an error. I have some lack of knowledge in this regard, can you please help?