When I first switched to Ubuntu, one of things that initially blew me away the virtual desktops. I took full advantage of them from the get go. It is such a simple thing that is made more apparent when I use someone elses Windows PC. I love them.
So, one of the first things I did after installing Cinnamon on my newly LMDE updated Dell was to figure out the virtual desktop deal. To add and remove virtual desktops you click on the 'Hot Corner' infinity emblem in the top left corner of the desktop.* This gives you a screen of all available desktops. On the right is a tab with a plus sign. Want more virtual desktops, click on it to your hearts content. To remove them, put the curser over a desktop and click on the 'X' in the top right corner.
Oh, one other thing I found today. I always used 'Ctrl+Alt+(Right Arrow or Left Arrow)' to move amongst desktops. With Cinnamon, if you select 'Ctrl+Alt+Up Arrow' it gives you a screen with all the desktops. Use 'Ctrl+Alt+(Right Arrow or Left Arrow)' to select the desktop you want and then 'Ctrl+Alt+Down Arrow' and it takes you there. It sounds more complicated that it really is.
Anyway, that is my first Linux Mint Debian with Cinnamon tip. There will be many more to come. I have a netbook and media server that will be changed over and need to make sure I have plenty of notes for when those days come.
* - It may be in the top right. I know, you are asking, well, what corner is it in? Well, the first thing I did after installing Cinnamon was to move the panel from the bottom to the top of the screen. Bam, the 'Hot Corner' was camoflaged for me. It took my checking out the Panel Settings, which led me to the Cinnamon Settings, where I found the Hot Corner settings, and once I moved that down to the bottom and clicked on it, I figured out what it was for. Trial by error or as they say RTFM.