@tlh28 - I too decided to try streaming a few years ago. I started with a Bluetooth receiver connected to one of the tape inputs on my then ARC SP-9 and simply used my phone to get Pandora. I loved the convenience and the ability to also stream from the Amazon Music app.
My next step was to a Bluesound Node2i via wifi. Another step up in sound quality though the wifi was a bit fiddly. Eventually I went hardwire from a Mesh router extension and solved that issue as well as improved the SQ even further. Taking BT out of the signal path will be a great improvement!
Next step was an external DAC, which the 2i allows you to use. I went with a Border Patrol DAC (tube rectified power supply) but there are many excellent DACs out there to listen to and choose from.
My final step with this rig was to upgrade from the switching power supply in the 2i to a PD Creative setup which cleaned up the grunge. So far I'm pretty pleased with this arrangement and don't see the need to upgrade considering the rest of my vintage system.
Two things (among many!) to consider: The first is whatever streamer you choose should have an easy to use, feature rich app to go with it. The BlueOS is okay but I'd consider it a starting point. The second is that whatever app you get also be able to access a variety of streaming services such as Qobuz, Tidal, Amazon, etc.
Happy listening.