iTunes

how can I install iTunes on my Mac. ?? its got the Catalina version ,,,, I need to install iTunes to put music on an apple iPod touch 7th generation... I've looked everywhere on apples site for iTunes,,, I find probably 12 different iTunes related downloads,,, but none are just the iTunes ,,, I don't know what to do here,,, its like I need to hire a geek to resolve this,,, can anyone help me?????? thanks,,,,