Reddit has an entire thread about how the fight works. There's already videos on youtube to give you a better overall idea. I've put out videos on my twitch just because people wanted to see how it worked with tanks. This content, is no different than learning any other extreme fight. The only difference is that the moves aren't said in the target window, and no telegraphs to prompt you. You have to stop using the FFXIV boss method, and think like you did before you could look up things on the internet for research. Think outside the box!