I am a shade tree mechanic and have pulled, rebuilt, and installed new pads on 4 3/4 and 1 ton trucks, and 6 older cars (1968-1995) before I got hurt and cannot do that kind of work anymore.
Now with that said, you could purchase all the necessary tools to do the job yourself, but you admit to knowing nothing about brakes. So my recommendation is to take it to a qualified mechanic shop to have it fixed. In my experience, trying to fix only one side leads to problems. You have to do both sides, install new pads, turn the rotors, and re-pack the wheel bearings.
If you persist in trying to do this your self, just purchase new calipers instead of trying to rebuild them. They are more complicated than the old slave cylinders of drum brakes. The new calipers should have new pads installed already so you have the complete package. Then all you need to do is pull the rotors and get them turned, repack the front bearings, install new bearing seals, and put everything back together. You should plan on a whole week for this process as shops that turn rotors do them in the order received and if they are good, it could be several days before they get to yours.
Good luck with your decision and choose to be safe and not cheap.