How to change current Apple music to student Apple music plan without losing library

For years I have paid for a family Apple music plan under my Apple ID. Only my two children have iPhones. I am an Android user.

Both of my children are in college now, and I understand that Apple music is more affordable under a student plan, and it comes with free Apple TV as well.

My daughters would like to migrate to Apple music student plans and retain their extensive music libraries.

We have found no definitive guidance for this in the forums.

We would like someone from Apple music to support us in doing this, but no one we've talked to seems to know how to do this.

So here we are. Hoping someone in the forum can help.

Much thanks