As time goes on and new operating systems are released, drivers videos and instruction pages from the past may not work for every system anymore.
For the new Kali 2022 linux release, we have a new video on our YouTube channel showing how to install the ALFA AWUS036ACH, AWUS036AC, and other Realtek RTL8812AU based chip products.
Once finished, here is another video you can watch to set to monitor mode for injection support.