There should be limit to everything, even if we call space infinite, im sure that its very big, that big, that we cant even measure nor really understand it.

So lets pretend that we stopped the time, the space stopped expanding and time is "paused", we teleport to the edge of anything we have ever known, whats past it? can we even cross this line or is it just like agar.io blob? If there is something then my theory is that light just hasnt passed it and if we go out there, we wouldnt see anything, it would just be pitch black, even if we look back at the place we stood before, it would be black because light hasn't travelled there, at the spot where you are "behind this line".
What if it is a blob that expands just like in agario (best example), you eat those small balls and your blob gets bigger, of course, space doesnt eat "balls" (jokes appreciated) but it expands cause of explosion in the beginning of anything.

Another thought- what if there are many universe "blobs", they shift their shape constantly, they expand too and they are just freely going around nothingness (as far as we know). What if there are many blobs with life inside them and the creatures in other blobs will never see our universe blob cause we couldn't cross the line, the edge of it. It would be some sort of forcefield. And if 2 blobs collided it will be same as in Agario- it will just shift its form and try to squeeze around, of course, planets wont be affected as they are just super tiny bits and there is no drag in space.


So most of us should be familiar with that how space began BUT there is my theory which could be believable.
So we COULD calculate how big was the star that exploded before universe began and it's quite an easy idea with hard task.

So to measure approximite size of the star that was existing first before anything, we have to count planets in our galaxy, there should be a way on how to do it. Then we count the galaxies around us as much as we can, even try to guess how many could be out there by signs of galaxy bunches and such things, then we just add the number up until all of galaxies, at least ones we can find with our technology have been counted and we should have the mass of this first star.
This mass could give us extremely good information on how big was the blast force, which could calculate for how long will space expand and what will happen afterwards and we could maybe prove that our universe and everything we have known is just extremely small and was created by one star explosion that was just bigger, way bigger.
Maybe there is this place in universe, where stars are just huge, bigger than we can ever imagine and that's just normal, maybe we are "leftovers" from just a star death.

Edit:new idea section "what was so big that existed before big boom?"

What if we could pass the "blob outter layer" ? What's Your theory on how space works? Let us all know! This is very deep topic to talk about and you really have to understand and be ready to imagine what i mean to catch the idea.