You don't have the same colours on the front and back of your doors and windows, no problem! You can now change the colour of the joinery on both sides.
Go to the vertical menu on the left of the plan, choose the desired texture in "decorate", and click on the joinery in question.
Here, pink on the inside:
Black on the outside:
You can't find all the types of doors you want? Perhaps a double swing door is missing ...
For this, choose the double-hung window
Then turn it into a door by going to the settings:
Reduce the spandrel height and change the size of the door: