Think about what you will say in class. Think about questions others may have. Think about your responses to these questions. For most people it is probably best to do the reading on your own, and somewhere quiet with few distractions. You will often find it much easier to refine your thinking on various topics by talking to other people in the class.
Most people are nervous about talking in class, asking questions, and writing on the board.
I expect and encourage you to work together. I also expect you to understand that plagiarism and all forms of cheating are serious crimes. Poor documentation deserves poor grades. Expect to work very hard in this course. Expect no reward for effort.