Gonna have a tough time getting door panel off with door shut. Roll window down and you may be able to release latch through there

Was it locked while in storage? Along with lots of lube I have opened a few by jacking the door lock knob up and down quickly, with the window down, while banging the outside of the door, below the lock with my other hand. It's a very satisfying feeling when she comes loose. Jack the lock knob and alternately bang the outside of the door and you will feel when she comes loose.
Honest, not a joke, I grew up on the east coast and freed up many stuck locks this way.

Thanks
Randy