Now you are ready to start making marks. Notice the scrap paper in the background, showing the scribbles where the line quality was adjusted. Don't skip this step.
Start writing or drawing...whatever you prefer. If ink is not flowing well, you may need to pump a little more. Do not pump directly on an object, as ink could perhaps flow more than you intended.
It's a new tool, give it a little time and learn to use it and I think you'll love it.
Shake the pen frequently to keep the ink from settling. It will settle anyway. If you notice your lines becoming lighter and lighter, you probably need to shake your bottle.