I did manage to get further...
First get the ) from the Picture next to the Clock.
Swap it around by looking at the Mirror at the Bathroom, now it looks like a C.
Put the C next to the weird A Symbol above the Door that leads down to the Exit door Staircase.
You need to stand at this exact spot otherwise the Game just doesn´t react.
Yes I did this over and over again for 2 Hours and only this one single Spot works, like I mentioned before way too finicky!!!
After that go down the Stairs and look up to the Lamp you will find another A symbol next to it.
Press C to pick it up. This one is also kind of finicky to pick up and doesn´t work when you are just positioned slightly off.
Now you have the weird A Symbol, you can swap this around as well by looking at the Mirror in the Bathroom but this Time you don´t need to do this.
Now look outside the third Window next to the Chandelier you find another Symbol outside on the Wall... just zoom in to change the A symbol you have to a weird J Symbol.
You can also swap this around like the C Symbol before....
And here I am stuck right now... Couldn´t find anything else even after playing for more than 4 Hours...
I want to be honest here...
This are way too many Steps for just a single Babylaugh, isn´t this supposed to be just an Alternative to making noise into your Microphone while being near a Lisa Haunting, shouldn´t this be just as difficult as well???
I think you went way too far with this!!!
This feels more like I am looking for an Secret Easter Egg Ending not just the regular End of the Game!!!