There are lots of things that happen in groups: the study of Scripture, praying for one another, eating food, serving each other, serving our community, and many other great things. I believe the most valuable aspect of groups though is the development of relationships with other people. I believe at the core what makes groups work is people connecting with one another.
As you are starting to host your new group over the next couple of weeks, I want to strongly encourage you to put most of your time and energy in building relationships in your groups. It is people relationship with you and others that is what is going to bring them back. So give yourself permission to focus on building relationships over the next couple months. The curriculum your group was given has opportunities to read and study the Bible together and to pray with one another. However, do not think you are your group is causally hanging out, eating together, or just having fun as a group as wasted time, instead this it is are valuable moments as group. They are important relational investments.