Welcome, Roxania, both to Seniorlearn and this discussion! We're delighted to see you here.
For you and Elainetm, the other newcomer to these discussions, I'll summarize how they work. In the pre-discussion, people sign up, get acquainted, and talk about relevant background--different versions, author's life, the atmosphere of the time, whatever. Some participants don't bother coming in to this after they sign up, but most do.
When the actual discussion starts, July 1 in this case, we divide the book up into chunks, and talk about one at a time; it's usually 1/4 of the book each week. A schedule will be posted, but we'll probably start with the first 6 chapters. We try not to talk ahead of the schedule no matter how far we've read individually, but earlier sections are fair game. Questions are posted as a starting point, but are often ignored.