Setup network with TP-Link Wireless N Router

Apologies for the very basic question. I've never setup a network from scratch with an Ion board and I just need some specific guidance please. We have an Ion Xe board at my school. It is not currently networked and I just want to be able to use the aRFR Classic app with it. I have tried following the wireless setup guidance with no joy. I am attempting to use a TP-Link TL-WR940N Wireless N Router. As I say, no existing network infrastructure exists. I appreciate how basic this request is but any guidance would be gratefully received. Many thanks.