First, a little friendly advice. LQ has half a million users from all over the world. Caution in making bad puns would be wise.
I've never heard of Zorin before. However, I just looked at their website, and I find their caution that "to avoid any complications, we recommend you to download Zorin OS using Firefox as other browsers may corrupt the file and may cause errors," rather odd, since, as a general rule, a browser opens a pipeline for a download, nothing more.
That was enough to persuade me not to experiment with it in virtualbox, because, frankly, a warning like that indicates that there is something cockeyed here.
I would suggest that you try a more mainstream distro, such as Ubuntu, Debian, Slackware, Fedora, Mint, or CentOS (Slackware is not the easiest to set up, because it doesn't offer to partition the HDD for you; it expects you to do that):
Here are the Linux references that I recommend as most accessible for persons new to Linux:
. It's oriented to Ubuntu, but it's full of good info.
. Machtelt Garrels Intro to Linux.
. Slackware oriented, but excellent on the basics, such as file structure, permissions, and the like.