To open iCloud Music Library on iPod, first make sure your iPod is connected to the Internet. Then, follow these steps:

1. Open the Settings app on your iPod.

2. Scroll and click on the "iCloud" option.

3. If you have not logged in to your iCloud account, please click "Sign In" and enter your Apple ID and password.

4. On the "iCloud" page, find the "Music" option and make sure it is turned on.

5. Return to the home screen and open the "Music" application.

6. In the Music app, tap the My Music tab.

7. On the "My Music" page, you should be able to see all the music in your iCloud Music Library.

Please remember that iCloud Music Library requires an active Apple Music or iTunes Match subscription to function properly. If you do not subscribe to any of these services, you may not be able to use the iCloud Music Library feature.

This is a common method, but please note that these steps may vary slightly on different iPod models and operating system versions. Therefore, before trying the above steps, it is best to consult the relevant iPod user manual or contact Apple customer support for more precise guidance.