Hi DavidJohn
Just before your AGM you will be sent an agenda. One of the items on the agenda should say Executive Committee. At the AGM when it gets to this item, people can be nominated for the EC. Or you can put your hand up and nominate yourself.
If you do go on your EC read up as much as you can about your own strata (eg by laws) info from the Department of Fair Trade, and especially this forum. Educate yourself as much as you can. And then, when you think you have learned alot, sit back and marvel as you find out something (usually on flat chat) that you didn't know ,just like many of us do!
Good on you for finding out about EC's and for wanting to be involved.