I’d apply directly to Qantas mainline.
With only a few thousand hours and no real ‘feeder’ airlines, you may as well get in and get your seniority number before recruitment stops again.
Lifestyle of the new hire second officers 787 is pretty good from what I’m told and you would qualify for a 737 FO slot reasonably quick.
Some see the SO role as beneath them, but the pay and lifestyle can’t be beat, especially in the long run.
Starting elsewhere as an FO would be on lesser conditions and delay getting a seniority number..