This page explains how to easily create collections. With 1 single license you can create unlimited collections where you can place objects.
Click on "Collections" in the menu on the left. Then click + to create a new collection. Enter the name of the collection and click "Save". The collection has been added to the list of collections.
Click on the "edit" button behind the name of the collection you want to edit. Change the name and click "Save".
Click on the "trash can" button to delete a collection. The objects you have added to the collection will not be deleted. These must be re-linked to a collection.