Classics related work experienceWatch
1. Travel/ holiday to visit archaeological or other places of related interest.
2. Join your local unis classics society if they have one and maybe get involved in a play or dig.
3. Ask for work experience at the classics department of your local uni.
5. just read some interesting articles or get published in the school mag.
I wouldnt worry about it too much.
There should also be lots of classics related websites where you can catch up on the archaeological aspects.