Received a 1099-k because I made over $600. I sell stuff on ebay but not as a business. How do I file this? I can't figure it out and I'm worried.

Basically I live in MA and I made over the $600 last year. I received a 1099-K year 2020 from Paypal and I don't know what to do. I spoke to someone who mentioned schedule C but I was panicking and can't remember. I just was selling Pokemon Cards to earn some money as on the side, not for a business. I can't figure out how to do this and I'm worried I'll go to jail because I can't figure out what to do even after I've spent hours reading about it. I just don't get it 😕