welcome to the forum. The first thing I recommend you do around here is search!
Because I presume embedded somewhere in this question is "which lounge should I visit" or "what should I do in the lounges" or something to that extent?
It's hard on mobile device but perhaps someone can put some convenient threads in. Or, just type in "best lounge" into advance search, or "lounge" or "long transit" or something to that extent. There should be 20+ threads that pop up.
You'll have access to 7 OW lounges: The Deck (J), The Wing (J), The Wing (F), The Bridge, The Pier (J), The Pier (F) and the Qantas lounge (J). You can also try searching for these specific lounge names.