For your system and Spotify I’d say the CXN V2 is probably overkill.
I have a CXA60 and use a Chromecast Audio (£17) for streaming and my Blu-ray player for CD’s (but ultimately now never do) both connected via digital. I doubt you’ll get any benefit audibly for the extra £982 (based on current pricing) over the Chromecast.
If new I’d suggest you return the streamer, get something like a Wiim Mini streamer (£99) and get some very nice speakers instead.
I’d probably also stay away from anyone recommending the CXN V2 when you don’t even have speakers.
Here's my two pence. Firstly, get a free trial of Tidal instead of Spotify. Usually you can get at least a month free. The price is the same but it's a higher quality stream rate so sounds better. There are various rippers to transfer playlists from Spotify to tidal or any other provider and vice versa.
The Chromecast Audio suggested above are no longer sold. They are now more like £70-80 second hand on ebay. Whilst these are good, your CXN knocks the socks off a Chromecast (I've owned both) so keep the CXN. I strongly disagree with the poster above on this point.
As for owning an amp and streamer but no speakers, that's a slightly odd way of doing it but hey-ho. You've already bought two decent items there - can you borrow some speakers whilst you save up for your own set?
If not, how much do you intend to spend on speakers and when do you think you'll be able to buy them?
Also, can you please describe your room dimensions and if you will be looking for floorstanders or stand mounted speakers, plus if the latter if you already own stands, or need to buy some?