Wrote this article when I was using Linux Mint
This tutorial is written on how to remove existing desktop environment and install xfce4.
Xfce4 is a light weight desktop environment with low memory footprint. Using Xfce4 is somewhat like using a mac, just a little bit older mac.
To remove desktop environment, e.g
apt-get autoremove --purge cinnamon
Now install Xfce4
apt-get install xfce4 xfce4-goodies
Reboot your workstation
shutdown -r now
On reboot, select xfce4 desktop environment somewhere near your username/login place.