ford fusion park break malfunction

ok so i have a high mileage ford fusion 2013, i’ve only had it for maybe about 3-4 months got it for cheap as my first car has a christmas tree but nothing major, no check engine light or anything but there was a parking break malfunction i didn’t think much of it till i heard a grinding sound when i hit speeds below 20 and was approaching a stop. it sounded bad but didn’t happen everytime it was kinda off n on so i let it be because i don’t know how much it’s gonna cost to fix something like that. fast forward to a hour ago my friends called and needed a ride so i go to reverse out of my drive way and im not moving…. i thought maybe its cs im in the grass but i finally get out the driveway and go to drive and it sounds like im doing burnouts like my back tires locked ,cars fwd so makes sense i wanna know if this is gonna be a a huge payment i have to make to fix it or if maybe i can even fix it myself somebody please let me know