Use the Imaginary X-Technique. Notice the four corners of the book, the margins of white and the pattern of white on the page. To notice all that you have to relax your gaze and allow your peripheral vision to do more of the job, use soft focus
Don't worry about getting and keeping the blip page. In the beginning you will lose it. Worry takes you right out of PhotoReading.
Try some of the other techniques for seeing the blip page if you want to play with that.
Look over the top of the book at an object in the distance or underneath at your shoe.
But if you want to get on with PhotoReading as a whole, relax use the imaginary X-Technique, say a chant and turn the pages in a steady rhythm and soon enough you'll notice you are seeing the blip page.
Alex