Alright, yes I messed up but I'm young and dumb and that is how I learn.
I had accidently put power steering fluid in my Brake reservoir and didn't find out that until later when I noticed brakes were super squishy and barely working.
The brakes would work when pressed down but then would get lighter then I'd have to press down harder then once again it would get lighter, then all the way to the floor and they barely worked.

Does anyone know what I would have to do? Parts I would have to get to fix this? Costs too? I know I'm going to need new seals but where would I buy those? What exactly would I get?