Desperate for help

I've been unable to stop crying for the past week because I am an 18-year-old student who has recently taken in a cat that my brother adopted which he ended up neglecting. I am currently in school and do not have an income, I am struggling to afford the costs for her vaccinations and spaying. My parents are on ODSP and cannot help either I love her so much and I can't find anyone who's willing to take her. I have so much love for her but I’m afraid to rehome her because I just cannot bear not knowing of whether she will receive proper care or potentially face mistreatment. Does anyone have any advice?

Update: I’ve successfully rehomed my cat to a loving family. It was a difficult decision, but I’m relieved and happy knowing she’s now with a family who can provide her with the care she deserves.