Well, I didn't have much time to explain, but I will explain you better now:
Blender (in my opinion) is very good to make functional models for Amnesia, always that you follow the instructions and that you have the latest version.
Blender works PERFECTLY when it comes to doing things without animations (desks, chairs, special things) but it won't work when you make an animation. I haven't tried to do a monster with a 2008 Blender (when Amnesia was released) so you can try to download it and try if it works.
Anyways, I wish you the best of luck. Modelling is a bit buggy sometimes