https://documentation.desire2learn.com/ This is a link to the latest updates and news related to the learning management platform.
https://documentation.desire2learn.com/en/Learning%20Environment This is a link to a large number of video clips which can walk you thorugh all the different functions and options you can use in the D2L environment. From start-up to advanced user, there is material here for you.
https://www.youtube.com/results?search_query=desire2learn+tutorials This is the company's dedicated youtube channel. On this site, you will find a plethora of youtube clips also showing you how to use the product. I find so much information among these clips.
https://docs.google.com/document/d/1BKyHBewl7JRk-XTg9Y8NUpAWX2NsPm2_CvYf8fgOSbo/edit?pli=1 This is Brightspace Training Videos on Demand, even more clips for your use.
https://community.brightspace.com/ This is the Brightspace community, where you can post questions and receive answers from other users.