Victim blaming is a huge, huge, huge problem. It’s not the only reason rape is so underreported, but it’s a big contributer, if not the biggest contributer. It’s why we call it the “second rape”. It’s so incredibly common for rape victims to find not just that the legal system is victim-blamey, but to find their support system abandon them. And hey, we have some victim-blaming right here, on this thread! Key search terms are going to be “rape myths”, “victim-blaming”, “slut-shaming”, “rape culture” (this is a really good, accessible intro to the theory of rape culture). Book-wise, you need Against Our Will, as it is the book that really starts off anti-rape theory, though it’s dated and many of the theories within it have fallen out of favor (especially Brownmiller’s thoughts on pornography). After that, get I Never Called It Rape.
BTW: are you in high school, or college? That might make a difference, sourcing-wise.
Judgements about victims and attackers in depicted rapes: A review
Community services for rape survivors: Enhancing psychological well-being or increasing trauma?
Cultural myths and supports for rape
Rape Victim Blaming as System Justification: The Role of Gender and Activation of Complementary Stereotypes (I would just follow the cites for that one)
Attitudinal antecedents of rape myth acceptance: A theoretical and empirical reexamination.
Rape Myths: in review
Nonstranger sexual aggression: A discriminant analysis of the psychological characteristics of undetected offenders
And then, after you’ve followed the bibliographies for those, just start typing things into Google Scholar, like rape victim-blaming, rape myths, rape culture, etc. And lemme know if you need any more help!