The only way for you to get away from that picture is to realize that the Big Bang wasn’t an explosion at all. All of space — meaning the metric itself, not just the _stuff_ filling space — started in a state of very high density, or equivalently, a very, very, VERY, small length scale. Then the metric itself — the space coordinate system — started expanding.

Picture having a sheet of graph paper printed onto a piece of rubber. Put clamps all around the edges of that rubber, and start pulling uniformly outward. If you do it right, the lines of the graph will stay perpendicular, the rubber will stay covered with neat squares, but all those squares will get bigger and bigger and bigger. Now cover the rubber with ants to represent astronomers.

If you make the rubber much larger than the size of the observers, then none of them will be able to see to the edges. They’ll all see the same basic thing — stuff far away is moving away from them fast, and stuff nearby is moving away slowly. Each observer will “seem” to be at the center of a great explosion, but nothing is blowing up, and there’s no center.

So how do we see cosmic background radiation which comes from the entire universe?

That and why there is no center of the universe baffle the crap out of me (ya I know not hard to do) – It just seems reasonable to assume that if the BB theory is correct then it popped into existence symmetrically and the universe expanded symmetrically in all directions from there which would make that spot the center – but it’s not and I do not understand why – I hope he gets to that at some point and explains it so I can “grok” it.