For changing lanes, you press the signal shifter part way without clicking. The shifter will return to center and the blinker will blink 3 times for your lane change. Only press the shifter all the way so it clicks when making a turn. Then, the steering wheel releases the click after the turn.
Coincidentally, the BMW also has a similar transmission shifter to the Jeep. Push forward for Reverse, then it returns to center. Pull back for Drive, then it returns to center. Park is a button on top.
I once borrowed a friend's car (fiat palio) and I literally couldn't get it out of parking. The reverse gear can only be selected if you lift the shifter and then shift. I felt extremely silly calling my friend and asking him how to shift to reverse.
Coincidentally, the BMW also has a similar transmission shifter to the Jeep. Push forward for Reverse, then it returns to center. Pull back for Drive, then it returns to center. Park is a button on top.