I would personally go with the analysis of societal construct and how that influences power. However, I'm not sure if this will work with your other texts as I haven't read them. Although if it does work then I think it would be beneficial to look at the chapters in which the implementation of the Gilead regime is described (eg... freezing the bank accounts).
Side note: you could also take the Marxist perspective of how the authors experiences and beliefs will influence a text (eg... Atwood was inspired by the puritan society, themes of environmental toxic waste leads us to think of Chernobyll).
Really sorry if this doesn't work, I really hope it helps to generate some ideas🤞 Good luck!! I found Literature coursework particularly difficult.