No, some people are visual, some auditory, others need to perform physical action, and still others merely use emotion and "feeling" there way through magick. It all depends on you. And part of learning how to practice magick is learning about yourself. You are obviously not strong with visualization, so you should try focusing on verbal cues (chant, mantra, song, etc), physical aids (sympathetic magick), and/or provoking old memory and emotions to "bring them forward" in order to reproduce them in new circumstances.
Learn what works best for you. Try it all! By working with your strengths, you may find that your weaknesses were not "weaknesses" at all. We are not good at everything! None of us. The trick is to find out what we are good at, get better at it, and use it to achieve our goals.
"If you judge a fish on its ability to climb a tree, it will live its whole life believing that it is stupid" -Albert Einstein