Hey @AT100,
A while back I posted a tutorial on installing Windows from inside Linux.
Mind you, the versions have changed since, so it will be wise to get the new version instead of the now outdated one. I’ll be doing a video on that too.
Per your C and D drives, your Zorin installation can normally see them in your File Manager, under the “Other Locations”. Naturally, they’re not named C and D, so you’ll have to open them to see which folders you’ll need. In the Windows installation one, your required folders are under Users (and your login username).
In order to utilize those folders under the VM, you will need to add them as shared - or simply connect them only to the VM as devices, provided the device you connect does not have Zorin installed (even in another partition).