I can't take it

Ok so a little back story, I recently moved out of state in with my grandparents to go to school and other reasons but my grandparents are driving my crazy. They are constantly being racist and belittling. I feel like they are always talking down to me and being disrespectful but if I defend myself than they get defensive and say that I'm being disrespectful. I have no personal space. I actually caught my grandma going through my trash!! She is also always going through my other things and reorganinzing them. I don't have a car either and I have to share one with them and I feel like anytime I ask to use it to go to school or work they give me hell and god forbid if I ask to hang out with friends. I'm 21! I need my own place but I don't have the means to do so.

Any advice to help me get through this before I lose my mind? :(