how can I download my own music

Hi bzbabq,

I understand you're trying to download your iTunes content and I want to help.

If these are songs your bought on the iTunes Store, you can redownload them as seen here:

Redownload apps, music, movies, TV shows, and books - Apple Support

If you had content you ripped to your iTunes library and are trying to sync that content to a device, you would follow these steps:

Use iTunes to sync your iPhone, iPad, or iPod with your computer - Apple Support

Thanks for using the Apple Support Communities.