I don't know why, but now it seems I can import CDs without getting any messages. But how do I get this music into my iCloud Music Library? This article—https://discussions.apple.com/activity?streamSource=connections—is supposed to be about that, but it seems to be saying that it should happen automatically. It doesn't give any instructions for what to do other than to turn on the iCloud Music Library. Mine's on already, but I see no signs that music I have imported from a CD is being uploaded. Additionally, a couple of days ago, on advice from someone else, I purchased iTunes Match which was supposed to solve the problem of my own music not being in the cloud. My iMac spent many hours supposedly uploading nearly 4,000 "songs." But when I look at the song list iTunes, very few of them show the cloud symbol that is supposed to mean they are in my iCloud Music Library. Many are on my iPhone, because I turned off iCloud Music Library on my iMac & iPhone, manually synced my local library with my iPhone's music, and then turned iCloud Music Library back on (this was recommended as a way to deal with getting my own music on my iPhone). Things I just imported from a CD are not on my iPhone, and do not turn up with a search, either of my library or of Apple Music, which apparently does not have this particular CD in its library.
So It appears that I purchased iTunes match for nothing. I'm confused. if it's not that convenient to make my own music available on my iPhone, okay. But it's extremely frustrating to not know what I'm supposed to do our what's supposed to happen when I do it. I have a lot of music, as I know many others have, and I paid a lot of money to buy it. I'm really disappointed that Apple has released this service without, apparently, being sure it wouldn't destroy user's private property. I have not discovered my music being destroyed, but I know many others have.