I assume you have the latest iTunes on your laptop? In "Music" you can import a CD, and by "adding files or folders to the library" you can import from many sources, Depending on the memory of your iPod you can then "synch" them all, or make a playlist (which you can change) of the songs you want to put on the iPod. I set iTunes to manually synch. Tis is a big subject so maybe you could be a little more specific in what you want to do. What operating system? What iPod?
HTC U12 Plus review: Hands-on