Cephas, it does sound harder then it is. I bought a NAS and used my Mac Desktop with a CD to rip my CD’s which was done over several months. I use dBpoweramp software on the Mac to rip the CD’s. I currently have around 2000 albums from CD’s or Downloads from the internet on the NAS. The NAS has an ethernet cable that runs to a switch. The switch is connected to the router with an ethernet cable. The switch also has a eternal cable running to the back of my streamer and another cable to the Mac Desktop.
I use a iPad with the Naim App on it and can easily connect to the NAS, Qobuz, and internet radio. It sounds a lot harder then it actually is to setup and use.
I have not used a CORE and chose not to since the cost savings of using a NAS heavily infuenced my decisions. Plenty of member here have used either one of the other and some both.
There are plenty of threads that you can find here and on the old forum and can use the search function to find lots of information.
Good luck with your decision.