Hey vchs, welcome to the forums!
(Rear Window has left my mind a bit but I'm looking through my notes and have found some things that might give you some ideas)
I would perhaps structure my essay:
Para 1: -Talk about how Hitchock's female characters initially are presented to fit 1950s gender stereotypes of submissive and delicate /dependent
- Lisa obeying Jeff's commands
- Lisa's dresses --> objectifying, appearances 'not wearing the same dress twice'
- 'Nagging wife' --> annoying, dependent
- 'Miss Torso' 'Miss Lonelyhearts' --> labelling, objectifying
Para2: -Men portrayed as more powerful
-'shut up'
- women(Stella and Lisa) serve Jeff
OR
Marriage is the expected outcome for women in this time period
- Miss Torso/Miss Lonelyhearts
- Lisa showing Jeff ring on finger
Para3: As the film progresses, the female characters break out of the stereotypes/ initial portrayals/ their independence is demonstrated
- Lisa's daring acts, letter + garden
- Lisa's outfit juxtaposed with her act of breaking into Thorwald's apartment shows that she can be true to herself/stay herself while being independent/brave/fitting Jeff's ideals
- Final scene --> Lisa's smile --> maybe she had the power after all/ got what she wanted without conforming
Hope that gives you a few ideas! :)