Listen, if you want to understand how emanations work, it's like this:
If you're an infinite thing like God, and you want to become a finite thing like the world, how do you go from infinite to finite? Answer: emanation.
You know when youre at a wedding, and there's a big pyramid of wine glasses? And they fill the wine glasses by pouring champagne into the top, so it overflows and then fills all the glasses beneath it? Imagine the wine bottle is infinite. That's God.
Each of the glasses is called a hypostasis. God can emanate through many hypostases to reach it's final emanation.
As for how many hypostases there are, and how they're arranged, that's the tricky one. Every religion has a different answer, and it's never simple.