A lot of people feel like they can’t visualise but we all have the ability to visualise. If you were asked “what colour are your bathroom towels” or “what colour is the front door of your best friend’s house?” your mind would immediately visualise what those objects look like.
Having said that, some of us are more visual than others. When it comes to hypnosis, the most important thing is actually how you feel, not what you can see. So, visualisation is not essential for success with hypnosis. Whatever is happening for you when you listen to the hypnosis track is absolutely perfect for you (whether you see absolutely nothing or see a vivid picture).