Hello I am sorry if I am bothering anyone with this simple question but I can't seem to find the transparent "colour". On Photoshop and manga studio I could for example use a custom brush and select the transparent colour and take away edges etc of existing layers.
Could someone tell me if there even is a transparent "colour" I can select?
Thank you for reading this! I am looking forward to am answer

I think you're looking for the eraser. Press 'E' to turn your current brush into an eraser, or press the eraser button in the top toolbar.