It’s better for OP to explain, but from what I read they don’t mind it being used in a collective work, but they want to make sure that collective work will also be CC-BY-SA. What from what they read it is no guarantee.

It took me a second to get it, but I got there eventually

I honestly went into the post just to make sure my eyes were not deceiving me. It’s very good news indeed!

You can use a VoIP or SIP provider and then to send SMS and MMS messages you can install an app called Chatty: https://flathub.org/apps/sm.puri.Chatty

I have bad handwriting and my friend misread something I wrote and I just added some numbers to it

If you want to try some niche music service there is resonate.coop which encourages exploration by making it cheap to listen to a song once. However, if you like the song and keep going back to it it will be considered “purchased” and you will no longer be charged when you listen to it. Last I checked there was no offline mode for purchased songs but they were working on it.