My advice is to do your homework on what the dept offers. How would you access other organisations, and mainly What policies, laws, etc are governed by the area in which you work. For instance, Child Protection legislation, equalities, human rights, mental health, confidentilaity, childrens act etc.Also the importance of keeping accurate and up-to-date records (thats crucial).
You can and ae wiling to work within a multi-disciplinary team, and can add professional expertise to the team.
Why do you want to work in this area, and, what can you bring into this dept that would help. Discuss the iportance of supervision and don't be afraid to say that you are willing to ask questions.
Good Luck.
I am sure you will get more information from others.
Blessings Rev Jack