RE: New to the R/C world - Need motor help!!
From the sound of it, the ESC is the problem, not the motor. (ESC = Electronic Speed Control) Since there doesn't appear to be a rudder, that ESC also contols direction by varying the speed of each motor. That complicates things if you don't know exactly what you're doing, but since those thingys are not typically "user repairable", I hope your warranty is good.
Those capacitors across the terminals of a motor are for 'dumping' AC components of the power fed to the motor to ground, getting rid of what's normally interference. They are almost always required for interference free operation. Adding them to a motor will VERY seldom ever hurt anything, and is just a generally good idea.
Some people are born knowing all of this stuff. The rest of us have to learn it. If we all haven't asked a 'dumb' question about parts of this hobby, it's only because someone beat us to it! So, don't worry about it. If someone laughs about a particular question, it's usually because they've asked the same @#$ thing at some point, or wish they had! To them/us, it is funny! It means we weren't the only one making the same mistake. (Except me, of course, I neber make mistakes.)