95 Grand AM problems w/starting

When I first turn the key I get nothing, I usually have to wiggle the shifter a little to get it to start. Also the light indicator for Park never comes on, it does for all the other gears. There must be some sort of linkage loose that prevents the car from starting in gear. Like I said, it will usually start when I move the shifter around - I'm just afraid that it will get worse and I won't be able to start the car at all one day. Does anyone know what the problem is here?