Sorry if this is a newbie question, but I'm flying from Portland to Auckland next week alli n F, and I have long layovers in LAX, MEL, and SYD. I want to make sure I know what lounges to use.

We are flying first on alaska, then 2 segments on QF, then from SYD to AKL on JetConnect

In LAX, is the OW lounge my only choice? I hear it's pretty crowded, so if there's a better one that we can get in the domestic terminal, that might work. We have a 10 hour layover.

In sydney, can we use the Qantas business class lounge if our next onward flight in on Jetconnect?

Thanks!