If you want install Oracle Linux on Oracle VirtualBox, you can follow this guide to download the VM tool, ISO file, and create the VM.

For those times when you absolutely must still run Windows XP, one safer way of doing it is to run XP in a virtual machine using the Oracle VirtualBox hypervisor on Linux Mint.

To install Windows 11 on Oracle VM VirtualBox, install Oracle VM VirtualBox, create a new Virtual Machine, start VM, boot from Windows 11 ISO file, etc.