The rod has likely popped out of place either at the top or down on the switch itself.
Does the engine start and run if you move the rod by hand?
If so, the rod has popped out of the little gear in the top of the steering column.
You will have to pull the steering wheel and start taking stuff apart till you see the little cam shaped toothed gear. The rod snaps into this gear, the gear is turned by the housing holding the key lock.
Carter BBD feeding 4.2 Nuttered 6 banger = 22 MPG Hwy
If it was easy, everyone would be doing it.