To Create a Collection, you will click the "New Collection" button on the left-hand side of the UpContent platform.
One thing worth noting:
The number of Collections you own will be determined by the plan you have subscribed to!
To create a Collection, make sure you're in the Collections portion of the UpContent platform. Once you're there, you click on the drop-down menu for collections at the top of the screen, and click "New Collection".
From there you will be able to name your Collections, add them to a folder, and provide a description and icon if you would like!