Hey dude, I’m going to blow your mind. Imagine a grain of sand. Now picture a beach. The scale difference is immense!
Infinity is not like that.
Now imagine the scale difference between a single atom, and the entire planet. Super immense!
Still, infinity is not like that.
Infinity is literally forever every single object you try to use to help yourself envision it is limited, where infinity is UNLIMITED.
Here it comes: even the observable universe is FINITE.
So now take all those people, if ALL of them became explorers, and each of them discovered a unique system EVERY SECOND. They’d still all die before a tenth of the galaxy was discovered.