Hey, here are some starting points:
* Human behaviour... think of Winston's characterisation throughout the triparte structure (state control, rebellion, defeat)
* Motivations... think of why Winston wants to rebel
* Assumptions... what is already in place in Oceania? Compare it to a contemporary setting, that could help. Think of why Orwell wrote this book in the first place (relate to Stalin's tyrannical rule of the Soviet Union etc.)
* New ideas... what does Winston's character show the audience about the effects of an oligarchal government?
You could break it down to something like this:
Winston challenges The Party ideals [
BEHAVIOUR -> note his behaviour is
inconsistent] by wanting to rebel through love (such as his relationship with Julia) and small acts (such as writing "Down with Big Brother" in his diary, wanting to start a collective rebellion etc.) [
IGNITE NEW IDEAS -> something like... an anomaly could exist within a totalitarian regime etc.]
(^^ I wrote it pretty basic so you can break it apart more)
Try this thread for related texts to 1984:
https://boredofstudies.org/threads/related-texts-to-1984.386470/
Hope that helps.