ASMR Universe(Web)

How do you actually add the one you want? I try pressing the green button and then selecting, or selecting and then pressing the green button, or dragging the options, but no matter what I do i end up with "scratching 1" and I hate scratching

Click the green button to add an effect.
Click on the grey button that appears with "Scratching 1" written below it.
The text will turn yellow.
While it's yellow, any sound you select from the left hand side will replace the sound currently being emitted.
If you wish to adjust the placement of the sound, you can drag it around the area, and listen to how the sound changes.
If you wish for the sound to move from one speaker to another, you can add a pair of nodes, and the sound will bounce back and forth between the two nodes.
If you decide to add another sound, hit the green button.
Note that until you select the new grey button, the text of the last one selected will still be yellow, and it will be that yellowed one whose sounds you will be adjusting.