Heyyy guys, just thought i'd share my experiences, I did two vce languages and went through the exact same thing as you guys are about to.. orals:
1) You guys appear to be pretty nervous, don't worry this is a good thing!
Nerves can atually help you out in knowing what you want to mention in the conversation, I remember my first oral was better than my second in that sense
2) Write a few dot points down on things you MUST mention for the general conversation/ study design, these might be interesting proverbs or sophisticated grammar that set you apart from every other person doing the same language and make your conversation unique.
3) The people are really nice who conduct the conversation. There are two people and they actually seem like they are interested in what you have to say, it's not scary in that sense
4) You might get pretty nervous outside the building because they have a few security people there, I suppose it's pretty intimidating but just try not to think about it
5) The usual procedure is something like this: There will be maybe 10 or so people in your allocated time. The security officer guy will buzz you all in and you have to go to some special area (maybe 15 mins before your oral, but double check with your teachers). At this special area, a lady will check your ID and everything to make sure you're a vce student doing french etc. You will then be escorted to another room outside where your interviews are to be held. I remember them just assuring us we'll be fine etc. Then you will be asked to sit outside your conversation room and then one of your interviewers will ask you to come inside. They will make sure the recording is working and then you will start your oral!
6) Time goes REALLY QUICK during the oral, at the end you'll be thinking oh my god I spoke french for 15 mins but it felt like 5, hence why I stress the importance of saying EVERYTHING you want to say that's interesting about grammar etc.
7) In terms of approaching the conversation I found that for general convo: Knowing what to say in english was important and knowing the sentence structures for how to translate it. The detailed study is easy, you can pretty much memorise this as you lead the conversation, just as Kaille was talking about when you discuss your intro. When they say your intro is 1 minute, it's 1 minute! Don't go into your conversation until they hear your intro and ask you questions:
One question they will ask you (i'm 99% certain they will) is at the end of the conversation, they will ask "and did you like your detailed study?".. so there's a response to practice for
Hope this helps!