Reading Reflections so far about Great Expectations

I'm reading along within the text along with keeping in check with the characters based on lecture notes. The novel seems to go somewhere, but I haven't to the point where Pip officially says why he hangs out with Magwitch. From the context of Pip's sister, the attitude she gives off suggests that she has given up on him; loss of trust and degrading relationship maybe. Also from the lecture notes, there are connections to Pip and Pip's sister being the mother and infant that Joe drew from wedlock. I have yet to meet Ms. Haversham and Estella and their presence of Pip's fantasy.