Help !

Easies would be to buy something like the bluesound vault 2i. It has built in storage, streaming ability and DAC all in one unit. outputs in digital or analogue via RCA.  

NAS  harder but has some advantages in larger potential size and better backup of data. also can move to any system that supports a DAC-streamer.  NAS (network storage device) with built in back up. then hook to your computer. using the disc drive in your computer and ripping software load your CD's onto the NAS. this will be time consuming. 
https://www.dbpoweramp.com/ is a very good software system for coping your CD's.

 A NAS will need a computer or a streamer-DAC to use. 

The Bluesound Vault is stand alone one box solution and may be the easiest as you just plug the RCA output into your audio system RCA inputs. the Vault also has a disc drive built in and the software. so just slip the disc in and it copies it to the internal hard drive. 

. Aurender is another similar system but more expensive. 

 I'd copy in FLAC if using the NAS or Vault. 

https://www.bluesound.com/products/vault-2i/

one last thing to consider is, if you have an internet connection and don't want to bother coping your CD's try a Tidal or Spotify streaming service.

 I was going  to get a Bluesound vault but after I got Tidal I can't be bothered as most CDs I was going to copy are already there just click and play. granted you need an account and that usually runs $10-$20 a month. but it goes were you go and you only need a steamer - computer.