Get the .ISO
Are you interested in taking a look at Windows 11 by creating a VirtualBox (or other) VM for it? If so, you can start at this location. Scroll down to the section that offers an .ISO file for creating a VM, and download it. Grab a cup of coffee and find something to do for half an hour of so, depending on your download speed.
If you plan to make a VM of some kind other than VirtualBox, I'll leave you here to do what you will with that .ISO file. I've only created one using VirtualBox, so it's the only platform I can claim knowledge of.
VirtualBox
If you're using VirtualBox, there's a good explanation from Oracle here that is almost 100% what you need. The newest version of VirtualBox in the repository offers Windows 11 as a type of VB to create, and selecting that type will provide the settings you need.
The only difference I found between the settings that default when you opt to create a Windows 11 VM and the instruction in the document above is that the document instructs you to create a 64 GB dynamic file, whereas selecting Windows 11 as a VM type to create will result in an 80 GB dynamic file. Everything else should work as stated in the Oracle document. Because this .vdi file is a dynamic one, it takes up very little space on your disk to start, and expands as your VM requires more.
What you must not forget: When you first start the new VM -- before you tell it to install Windows 11 -- you need to press Shift+F10 to open a terminal. Then you open regedit and create new key and a few settings that will allow the installation process to avoid three checks that will otherwise cause the installation to fail. If you've ever used regedit, you'll know how to do this. And the document includes illustrations to help you.
From there,the installation should go normally. It's almost identical to the Windows 10 installation, but with a slightly different UI. It should look familiar to most of you. Don't forget to load the VBoxGuestAdditions into the VM's CD drive, and install the Windows version, if you want to be able to take the VM to full screen.
