How to sign up for Apple One and not lose current Apple Music from Family Subscription?

I suspect Apple has accommodated that when you sign up.

Bundle Apple subscriptions with Apple One - https://support.apple.com/HT211659

"If you already subscribe to Apple Music, Apple News+, Apple Arcade, or Apple TV+, you don't need to cancel those subscriptions. They will automatically be canceled when you're billed for Apple One."

Sorry, all I know is what i read about it. This link What happens to your iCloud storage plan when you sign up for Apple One - Apple Support about iCloud storage has a section where it says a family member can choose if they want to join in with the family plan or stick with their own. I don't know if it is the same for all the shareable plans. It may just be if they accept the invitation to a family plan that their is canceled automatically, but I guess one could just keep an eye on things to make sure your personal one doesn't continue.