The latch is proabably engaged therefore not allowing you to shut the hood..The latch is in somewhat of a hook shape you cant miss it…If that doesnt work just light the car on fire and ride your bike..
Sounds like a mess, may be your muffler bearing, when they go many odd things can occur, as if the car is haunted. Or your reverse ancillary transmission injector, very bad. Yet it my be the forward velocity inertia sensor. Or the all time great, your P-38 explosive space modulator could be shot. But try the latch