I recently had a similar experience. I couldn't open or unlock the drivers door. I don't understand why you can't start the car. If you get into the drivers seet from the passenger side can you start the car? I believe you must have your foot on the break to start the car. If you can I know how to resolve your issue without ruining the drivers door panel. The dealership said if they fix it they destroy the door panel. The door panel alone cost $500.00. Then you also have other costs to repair it.
Can you lock and unlock the rest of the doors with the remote key?
Does the door handle move it's full travel when you try to open the door?
Both inside and outside?
If it does you have the same problem I did.
Docfxit