Gear shift sticks
#3
Sounds to me like a defective shift interlock switch.
#4
Sometimes if you let it warm up with the motor running it helps, also turn the wheel back and forth then straight it might help too.
Then once it is free open up the shift area and check for debris, clean the inside and there maybe a solenoid in there that is bad too. good luck
Then once it is free open up the shift area and check for debris, clean the inside and there maybe a solenoid in there that is bad too. good luck