Wireless to optical does not compute. You’ll never get there with a laptop and a D2.
Start over.
I almost went that route before I got my first actual music streamer for $200. Never look back or a pillar of salt ensues.
Will a wireless streamer add problems to a signal coming out of a computers USB output?
Between my Mac and a good DAC, I have a wireless streamer device. It purports to do various things to help with a USB signal coming into it, but perhaps I can approve my sound by doing something different?