Transit – 6 hours in Melbourne Airport, with bags!

We will arrive at Melbourne (Tullamarine) T2 at 06:30 in the morning, but our flight to Hobart (T1) will start at 12:45.
We were told to pick up our checked baggage but can not check in the baggage until two hours before the Hobart flight.
I do not know this airport, but at other airports I've been to there are no seats, shops or restaurants until you get through the check-in.
Do we sit on our luggage in the check-in hall for four hours until check-in opens or is there any area in Melbourne Airport where we can sit comfortably and even have a drink?

We would be pleased to receive a consultation as we arrive via DXB from the UK and will be on the road for almost 22 hours!
Many Thanks,