Subject: Re: OT: what does an expanding universe mean?
Second, my “theory” is that the universe is not infinite, but is being “created” at the margins.

Define "margins".

It's it the matter space and time that is the farthest from the Earth? Are we back to the Earth centric universe?

If not, and the universe is homogeneous, then there is no margin. So your theory is that new time space and matter are being created inside your own stomach continuously, and everywhere else you can see as well.