How do I get to the itunes store on my laptop to buy and download music for my ipod

A Windows laptop? See: Download and use iTunes for Windows - Apple Support

A Mac running macOS Catalina, Big Sur or Monterey? iTunes was discontinued and replaced with other apps. See: What happened to iTunes? - Apple Support

You can use the Music app and the following instructions: Buy music from the iTunes Store - Apple Support

You’ll want to download and use the iTunes Store app, if that’s not installed on your iPod touch: https://apps.apple.com/us/app/itunes-store/id915061235

If this is an iPod and not an iPod touch, you’ll need to use the iTunes Store on your Mac or Windows (buy) system.