Advice on reading Nietzsche

So I am about to read the Genealogy of Morality for the second time in my life and I was wondering if anyone had any tips from experience concerning how I should approach the text. Are there any specific questions I should be asking? Should I read it once slowly and methodically? Or very quickly followed by a slower reading? Should I start with the third or second treatise as opposed to the first?

I don’t know the answer to your question, but the title of your post made me want to solicit my advice on reading Nietzche: read the bible first if you haven’t already

That’s a daunting task. Which edition/version?

edition/version is important question, but I have no suggestion here

The OP reminded me of this lecture series, which may be helpful (I’m linking to the third lecture on purpose, because I don’t think the first two are very important):

https://www.youtube.com/watch?v=VDd1Lj39MyY&list=PLDScx_zOWL61qq-IbE1A-GaqVVy9t_w6s&index=3

Nietzsche lecture by Prof. Raymond Geuss 3/7