You just want to get a feel for it, so I suggest what I've used with success in the past :
Windows host
Virtualbox
Linux Mint with the XFCE desktop environment.
All free, Linux mint is newbies friendly and XFCE is light enough to run well in a VM. It is Ubuntu based so it's very well documented (basically 99% of the tutorials for Ubuntu work with Mint) but it comes with less bloatware and a more ethics.
Of course no single Linux distribution is perfect or we would all be using it but I suggest you don't lose time looking for a distro. Just pick one and install it. If you don't like the look and feel, then try another. You can distro hop through several of them to taste the variations. But the general principles are pretty much the same across the board.