I'm not sure if this answers the question, but it might help.

Everything in space is moving, but it's not expanding outward from a central point, like an explosion. Instead, the space between the things is getting bigger.

The balloon analogy gets thrown around a lot, but I find it misleading- It's not about the balloon getting bigger, expanding outward from the center of the sphere. It's more about the surface of that balloon stretching.

The rubber sheet analogy helps. Scatter a bunch of things on a infinite rubber sheet. Now stretch that in all directions - the things get further apart, but are not moving away from a central point.