Please help

So im driving down my neighboorhood street at about 25 mph and all the sudden i hear a loud clunk and my front left wheel almost goes horizontal and i come to an abrupt stop. right upper ball joint had snapped. managed to reverse the half mile back to the house at about 1 mile an hour . i hear this is sorta common with blazers. i have a 97 4x4 and i need someone to please help me out. i dont know much about ball joints or suspension type of things. if anyone can tell me how to replace it and where or how much whatever i will need to get will cost i would appreciate it very much. no damage was done to anything else except for the rim while i was reversing and those are just small cuts into the rim from it rubbing. thanks in advance

i got it jacked up in my driveway but still dont know how to fix it