What Is Infinite?

i try to describe it to my mam one time, you know, by i pulled a cooky sheet outitcauseit had like, a grid on it. And i said, imagine that this grid just keeps going like, forever, right, in all directions. And she's like, well, it can't start or end anywhere, like, it's nothing. S like, right? You just realize that infinity is nothing, like you just caught the secret. That whole plane of, sort of, this all this physicality isn't,. Like, it's real, but it's not physical, and it's not you. It's like a big old mental sand box