No, you completely understand quantum physics, you are one of the elite.

But in the analogy I don’t think we know what the air in the balloon is, we call it expansion. But I don’t know enough to say anymore

We are the dots on the surface of the balloon. Things really far away seem to be moving away from us. Hopefully we can figure out what gravity is because that would have a lot of gravitas I dunno whatever

I’m fairly certain that in the balloon example metaphor, we are two dimensional creatures on the surface of the balloon

Space time itself is expanding which means I will now blow up soon. Yay!