Start with the boxes of colored text OP supplies top-middle of the graphic. Follow the arrows and color coding (generally left to right) as you move through the color coded steps. As you get to the bottom middle OP provides more context tying together the disparate images and drops you've read. After you've read everything, start over at the beginning, it should become much clearer the second time around.

It's like pointillism, the image appears more clear the further away you look at it.

FWIW, I think OP is generally the best I've seen at producing these Spider Web Graphics. They also get easier the more of them you try to understand. I started very like you, now they're fairly easy to read. 👍