When you get a DAC make sure that it has a USB input (most do). You can get started with streaming by using a laptop connected to the DAC with USB. It's best to hardwire the PC to the router vs. using wifi.
I have my ASUS gaming laptop hooked up to my DAC and the only service I subscribe to is Qobuz. I've compared the streamed content to the corresponding CD on a number of titles and they sound virtually identical. If there is some sort of bad juju coming from the computer I can't hear it. [I'm running an Audio Mirror Tubadour IV DAC]
The reason I suggest this is because there are a zillion different streaming options and you should take your time to figure out what you want when you go for a dedicated streamer. This simple setup lets you get your feet wet and get a sense of where you want to go next. I feel that you should look into Roon because it provides some powerful features but it's not for everyone. If you decide to go that route you will have to buy a streamer that is compatible.
In short, don't get lost in the weeds when you get started. Many of us have a spare laptop that we can use for streaming and it is a simple way to get going.