[BitWielder1]

Don't confuse the size of the universe with the size of the observable universe.
There is no actual edge, we just can't see any further than that. Yet.
Similar to the horizon on earth, you can't see the sea further away but if you go there (and on earth it's possible) it does not look much different than where you were.
If you managed to travel in an instant to what you think is the end of the universe, you will find billions of years have passed at the spot you observed, expansion has taken place and the overall view of the universe from there will be pretty much the same as from home.
The Universe has no center. Earth is only where our viewpoint is. It's not special.

[Oatka]

Similar to the horizon on earth, you can't see the sea further away but if you go there (and on earth it's possible) it does not look much different than where you were.

If you keep on going, you end up where you started. Maybe that's how the Universe works - a celestial Möbius strip. :-)