Like others have said, get the computer out of the equation and get an inexpensive streamer to start with. If it doesn’t sound better, you can always resell it.
All the best.
Do I need a streamer?
Streaming devices, with or without an internal DAC, seem to be very popular these days, so I am wondering if I am missing out on something. I have Audirvana on my iMac that streams Tidal and music from my 8 TB external HD. My iMac resides next to my audio rack and I connect my iMac via an optical cable (Fibbr) to my Aqua LaVoce DAC. It seems to me that my iMac and external HD take the place of a streaming device. Am I missing out on something other than convenience? My external HD was a few hundred bucks and streamers a whole lot more. The sound of my system is fantastic.