Rather than us initially doing books in the Old Testament, what if we did more of a survey of the big story by using a really good textbook that is meant for undergraduates that don't have a big knowledge of the Old Testament?
What if we studied that in each of the Bible studies? And there are assigned Bible readings in each chapter and questions at end of each chapter.
Have you looked at the book yet? It's really good material, and I'm thinking we could benefit from everyone going through it first as we preach on Genesis, Exodus, Leviticus, Deuteronomy starting in September 3, 2017.
We could start studies as soon as summer if some of your schedules allow as a preparation.
Robert Garland also suggested starting with the N.T. Wright book, "Scripture and the Authority of God," but I am preaching from some of those themes and will cover that in a way that will give us preparation of the overall way we approach Scripture.