Beginnings can be intimidating. A blank canvas, or an empty white screen staring back at you. Laughing in your face. Rattling to your fear of failure.
The cure is simple: Start by breaking the paper.
Break the whiteness before you start working. Breaking comes before working. They are two very different things. The sequence is important. You want to break the emptyness in order to take the pressure off the first bit of the real work.
Type nonsense, pour random colour, drag the pen, spill ink. Physically or digitally, same deal. Then leave it to cure for a bit. Do something else.
Then — and only then — start working on your newly broken paper.