Good move. I have used Tidal for a long time. Now, I use Tidal MSQ on a Macbook. I have to say that I don't think there is a better way to listen to music if you want to enjoy a kick-ass collection. For the $20 a month, it cannot be beat, IMO.
I have a Nuprime DAC10 that has a USB input. I USB cable between my laptop and the DAC. That is all there is to it. If your Oppo does not accept a USB connection, I would upgrade the DAC.
I have a Node2 new in the box and I haven't even bothered to hook it up because I listen only near field, so why bother?
Add a good quality USB cable and that is all I need to get a very nice sound from TIdal. It is FLAC quality for me.