If you mean a Mondeo ST24, as in the V6 2.5L Duratec engine, then a few of us have had them on here
As a first car I wouldn't recommend as it's probably a tad expensive on the insurance side, and not very good for fuel efficiency, and is fairly quick. However I'm not sure how much of an issue that is for you down under.
I would reccomend one yes, I think they are fantastic cars for the money, even better is the ST200. There are a few things to look out for on european models, however I'm not sure if the same can be said for the Oz models.