Strips for the pintles were added to the rudder. I determined that, at this scale, pins were not needed and would be hidden from view anyway, so they were omitted.
The gudgeons were added to the hull.
After watching a few tutorials, I managed to create a reasonable propeller in Fusion 360.
I wasn’t sure what the right size would be to fill the space, so I printed the propeller in several sizes.
The rudder and propeller were glued into place, and the rudder chains were attached.
Here is my reference photo for the rudder, found on sultanaeducation.org.