Cannot connect Yamaha AG03

I got the Yamaha AG03 mixing console so I can plug in and record my electric guitar, the console came with the Cubase AI 10 software so I downloaded that but it wont record what I am playing. I watched some youtube tutorials on how to set it up and at the top of their screen there is a “devices” button to set it up but that doesn’t show up on my computer (2018 Macbook pro). I don’t know if anyone knows how to set this up so I can record but any tips would be greatly appreciated!