Personal CD Downloads Missing
About 20 years ago, I downloaded my CDs to iTunes and my iPod. Along came Pandora & Spotify, and I quit using iTunes. I changed computers a few times without downloading iTunes. After unlocking my account and changing passwords today, I downloaded iTunes and iCloud to my Windows computer. My old music isn't listed anywhere I can find it. (I have no idea what iCloud does that makes me need it in addition to iTunes. Do I need it?) I want the music from back in the day. How do I recover my CD downloads? Thank you.
Windows, Windows 10