You just need an ethernet cable (cat-5e or cat-6, go with whichever is cheaper in your area) and you plug one in to the port on your computer, and you plug the other into (one of) the LAN ports on your wifi. I don't have any recommended settings for Air Link or even regular Link as both work like garbage on my computer compared to Virtual Desktop though if I had the additional latency from not having my computer wired I'd probably be on regular Link. Most of the other settings really depend on your GPU performance, so play around. Also, if you record gameplay via OBS or other systems on your PC, you should do a test while recording to see which is better in that situation, as it will be sharing encoders with Virtual Desktop. I recommend trying with sliced encoding on AND off to see which is better for your GPU. I'm on Wifi 5ghz and I use 70mbps for VR streaming sometimes I bump it up for the few games that really need it (High detail long-draw distance games like Skyrim) but it's great for most games. On Virtual Desktop I recommend disabling automatic bitrate and adjusting your bitrate settings to something appropriate for you. You don't have an ethernet port on your computer? It just plugs into the router your computer then will have internet access (no wifi needed) and the latency between your computer and your headset will be basically halved. I just don’t have an Ethernet option and to be honest I don’t really understand how it works.

Virtual cable for obs