Hello sloppy and welcome to the forum.
I can't really help with your query as I have no experience of committee run settings, however I do know that lots of our lovely forum members do have lots of knowledge, so hopefully someone more helpful will come along soon.
Did the 'outgoing' chair leave any info/paperwork for you? Is there an experienced Committee Secretary still in place? Have you spoken to the pre-school/manager and staff to see what their expectations are? Do you have a link to your LA settings advisor?
I wish you well going forward.