I have a Wiim Pro and it was one of the easiest to setup streaming devices I've seen. I bought it for my wife as she finds my LMS streaming setup a bit too complicated. We primarily use the Wiim Pro for Qobuz.
A couple of notes -- setup involves installing the Wiim app on your Android or iPhone which then communicates directly with the Pro and allows you to configure things. I think this defaults to Wifi first, which is why that step is necessary. Also, note that the Pro only outputs to an external DAC via coax or optical. There is no USB output. (It will also do Airplay and Bluetooth, but it doesn't sound like those are of interest to you.)
You may also want to visit the Wiim forums here: https://forum.wiimhome.com/