Go get yourself a Haynes manual for $20!!!
Money well spent.

Just remember, in the rear calipers, twist to plunge in to make room for new pads, (in the front use a c-clamp). Also, you will need to pay attention to the emergency brake. While you have the car on jack stand, go and pull the brake handle and got spin the rear wheel. it should be loose when lever is down and grab when on about 3 clicks.

Usually you can take a jack and put the jack stand under the wheel you are testing, than spin that wheel and see if you can hear the noises. You can do the fronts as well, but do it one wheel on the ground so the differential switch to the wheel in the air. You have to have the car on if it is auto tranny. BUT PLEASE BE CAREFULL DOING SO!

Remember, the calipers needs to slide a bit and the caliper bolts must have grease in them. All boots (2) needs to be in tact.

I highly doubt that if you had it replaced a few month ago it will be bad unless whoever put it in did it wrong.

It take time for the pads to bed in with the rotors. Some pads are worst than others though. There is the bed-in prcedure, 60MPH to 20 hard breaking a few time should cure it. probably 500-1000 miles to really bed in.