brent The VM experience near the top of my linux to-do list.
You surprise me sometimes. There's nothing really technical about using VMs - certainly not something beyond your skill level. It basically breaks down into several steps ...
You create a VM by selecting "New" in the VirtualBox VM manager. It will walk you through the steps of creating a new file that will become the file system for the VM. You can pretty safely accept all the defaults, however you might want to use slightly more resources (disk size, etc) depending on the purpose of that VM. The file will default to a dynamic version, which will start out very small and expand automatically if your VM ever needs more room, up to the maximum size you select.
The above takes just a couple of minutes after you've done it at least once. Next, you create the VM itself. Various options like number of processors, the .ISO file to load, and lots of settings pertaining to video, network, USB, etc. occupy the VM file, which is separate from the system disk drive you created in the first step. (These two files together actually comprise the VM. This one links to the first one.)
Then you're able to tell the VM Manager to Start the virtual machine. If all went well, it will launch in a window that I think is about 600x400. The next thing I do is adjust the screen resolution (in the VM's settings) to be the size of my screen, which usually is 1920x1080. That allows me to toggle it between the small size and the full screen size by pressing the Ctrl key on the right side of the keyboard. The bigger size makes configuration easier.
From there, it's very little different than installing the .ISO on hardware. The VirtualBox user manual is 200+ full size pages, so the above is not a complete tutorial, but consider it an overview that's meant to show you how simple the VM creating process actually is. You've solved problems for people here in the forum that required a lot more skill.
That's not to say that you won't learn things along the way, or that creating your second VM won't go a lot smoother than creating the first one. An obvious, but seldom mentioned advantage of VMs is that if you create one that turns out to be crap, you can often repair it with the VBox manager, or simply delete it if it's really bad. You thus get all the file system real estate back, and can start over with your improved skills.
As always, I'm here to help whenever you have questions. And I know there are lots of other VirtualBox users on the forum. You'll never be alone on your VM adventure!