Hi Julie,
We are in Mount Martha and absolutely love it. My parents have been out twice for a holiday and like it too. My opinion is that you need at least a year to feel settled and should embrace the way of life/differences to the UK. Mornington and Mount Martha are full of Brits and Irish and we have never felt isolated. It is a huge adventure and being with your daughter will be great We had never been to Australia, just got the visa and sold the house, quit our jobs and got on the plane with 3 year old twins (we must have been mad lol!). Good luck with everything!
Emma