Just don't worry about it at all. There's no way to increase your chances, and you don't have to fight anything so your gear doesn't matter.
It's 100% based on luck, so you have exactly the same chances of passing as anyone else attempting it on a feeder class (the chances of passing your first one are 1/6 so don't stress if you don't pass).
I could tell you exactly what it is, but it won't help your chances and honestly I think that it's better as a surprise

Good luck
