Sydney and Brisbane

Hey mates . I'm looking for a couch to crash in Sydney and Brisbane.
Mostly looking for pple my age.
I'll be in Sydney most probably monday 17 and stay there a few days. And then drive up to Brisbane for a few days also.
Mostly looking for 2-3 nights. I'm super discreet and don't cause trouble haha
I'm on couchsurfing.org also !
If you can host I'd really appreciate :
(Nothing is settled on dates since I'll go with the flow :). )