It does appear that the wireless display adapter isn't going to work with your model.
Are you a fan of Chrome? Check out this article:
https://www.lifewire.com/use-chromecast-to-show...
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.
You should be able to cast your desktop with Chrome / ChromeCast. This solution will probably work for you.
- C