Reach around and hold onto the door handle so it does not fall or scrape your paint when it comes loose. Be careful with your pins in the lock cylinder portion.
Take it all apart, clean and lube everything. Same thing with the actuator inside the door. A little emory cloth and grease may save you a door trigger in the future.
Here's a pic I took for a how to a while ago...84 Carrera for reference.
