Removed the actual handle, but now the mechanism the handles goes into, is preventing me from removing the door card? Do I just prey it off?

Ant advice would be greatly appreciated, as I’m trying to remove the door cards, but can’t until I remove the entire crank window assembly.

I’m guessing you’re talking about the window winder handle? 

Once the handle is off after removing the retainer clip, the plastic bits should come off relatively easily. Remove the door handle and the surround of the handle that opens the door, then the door card can be unclipped. 

Cheers 

Bennie

As mentioned above. Step one spring clip on backside of window crank ( US term) then crank handle comes off easily. 
Two: door handle remote cover has one screw. While holding the handle outward you’ll be able to free up the remote cover. Be careful don’t pry anything. 
 

Large upholstered door pull handle has two screws. Once all those are off the panel you can grab from the bottom edge, I go to a corner. Start pulling gently toward you and the door card will begin to pop off. You’ll notice the clips if you lightly tension before yanking hard and then you can position closer to the clip and then you won’t damage the Masonite panel which does happen when you rush. If needed get a thin straight screw driver and pop the clips right close as you can to the clip. But that’s mostly for cars sitting long long times.

With the clips all popped you just lift the upper curved section up from the door. 
 

Lots of bits getting hard to find. Folks aren’t as willing to give up their stand by parts from parts cars etc. So I recommend you take your time. And also Enjoy !