I don’t have much to add, but I think the simplest solution for the OP is to get a streamer with a built in ripper and storage. The second best option is to get a NAS and rip the CDs to it, but this usually requires a computer as well, particularly for editing metadata.
@rvpiano a word of caution. For Classical Music, there is no good software management system. It’s all designed for other genres. Perhaps you know this already. If you do rip your CDs with the goal of discarding them, be prepared to edit the metadata so that it makes sense to you