Hey Vivian,
Melbourne is very busy this time of the year. The weather is starting to warm up and everybody is making the most of it. A must see whilst in Melbourne is the city centre, you will spend hours wandering around, check out Federation Square and the Southbank Prominade along the Yarra River. A trendy place to stay, eat and party is St Kilda, it is down by the beach and is only about a 10 minute tram ride to the city. I hope you enjoy your stay.
Kirk