How do you dislocate your finger?

If you don't do it on purpose its the same thing. If it dislocates it dislocates. People always randomly get tgeir bones dislocated.

its your ring finger. they call it that cause when you get married or engaged you would put the ring on your left ring finger

For some people, yes. Other people claim the ring finger is the weakest finger.

The finger to the right of the pinky on your left hand

Yes - you can get trigger finger in any finger in your hand, including the thumb. See the video link below on the symptoms of trigger finger.