Do you mean a different one for each monitor? There is a dropdown which, by default, I think it says Apply to all my Monitors.
If you hit the dropdown, there are options for each monitor. As for acquiring Scapes, just use the online tab and download what you like.
As for a tutorial, this is as close as it gets.
https://www.stardock.com/products/deskscapes/helpds325/welcome.htm
That's kinda old, here is a more modern video.
https://www.wincustomize.com/dream
