As for opening the door, there are two ways to do that.
Manual instructions:
Select your door, then on the Modify tab, scroll down to Pivot sub tab.
Depending on your door's orientation, select one of the left or right buttons. I prefer, middle, but you can use bottom right or top left, etc. Just make sure the pivot is not in the middle, or the door will spin on its center.
75% of original size (was 670x19) - Click to enlarge
Then on the frame you want to open, on the time line (F3 if not visible) set the open transform value.
Make sure your door pivots on the correct hinge, whichever way you want to open.
Show the timeline by pressing F3, or Window Timeline, add a keyframe in the Transform section, and set the value for your door to closed.
Then on the timeline, go to the frame you want to open, and change the value of the rotation z (most likely, could vary by prop).
Mine went from -180 closed, to -270 open.
75% of original size (was 670x19) - Click to enlarge
75% of original size (was 670x19) - Click to enlarge
I have a Python script that opens a door to a shuffle machine for my Poker Room. You could modify the script in Notepad or your favorite text editor (I use Visual Studio)
https://github.com/DataJuggler/PythonScripts/blob/main/Poker%20Room%20Python%20Widget.py
You would have to modify the Open Shuffle Machine method and Close Shuffle Machine method, but it is the same logic.
When I get off work I may make a more generic open door script.
Creator of the free website:
PixelDatabase.Net
A Free Online Text Based Image Editor
75% of original size (was 670x19) - Click to enlarge