I'm starting to consider that if 3 devices can't have different songs under one plan for Spotify

With AM, you can add up to 5 devices with the family plan. And if you're a student, you get 50% off the plan. So that's $5 a month for the single device or $7.50 for up to 5.

you can have different songs on different devices

Can u please tell me how to do that?

I downloaded on my phone and then I logged into my account on my moms phone and saw all my songs on her phone. And when I deleted a song off my moms phone it then deleted that same song off of my phone?

I didn't know AM had a student discount too 👀

This!