Task Force - Door WON'T Open/The Other Won't Latch!

[Dan in Pasadena]

So I've been doing a bunch of refurbishing and "things" have been apart awhile.

DRIVER DOOR:
I attached the latch (the on-the-door part) which engages with the long arm to the door handle, then mounted the latch to the door with new screws (yes, the correct ones). The handle movement causes NOTHING to move! I took it all off, manually moved the latch mechanism - it movs fine, the long arm IS attached/engaged on it. I've gotta be doing something wrong.

PASSENGER DOOR

On this door the latch (again, the on-the-door part) had NOT been off the truck. So (I think) I know its installed correctly.

But I removed the part on the door frame (called the striker plate?) painted & reinstalled it, approximately "centered". I did close the door slowly to see if the latch would fit between the "bumps" - for lack of a better term - without hitting them. See "bumps" below:

This is the driver's side. It's right-side-up, isn't it?

It immediately would NOT open, would not "un-latch".

I figured, "It's ok, I left the door locked! I went inside, moved the handle - nothing. Rolled the window down and tried operating the outside button and/or the inside handle and pulled on the door - NOTHING. I tried shouldering the door HARD from the inside - nothing.

At this point I've just gotta figure out how to open the door at all. ALL suggestions deeply appreciated.