Down below provides a list of key tips for infographics.
Instead of using text to describe every aspect for example, saying 9 out of 10 people prefer this product, use an image to signify this instead, for example:
Now text can accompany this to explain it but the idea is that if the text is taken away, the infographic and the point you are trying to make still makes sense, a good example of this sort of storytelling is graphic novels where the visuals tell most of the story and the text is just an accompaniment to the visuals.
Keep the story you want to tell in mind when creating your infographic. When doing infographics you shouldn't just haphazardly decide what type of infographic it should be and how it should flow. You should create a plan beforehand that lays out exactly what you should be placing on the page and what type of infographic you are doing. A good idea is to create a storyboard that lays out roughly the images and texts that the infographics are made out of and in what order and the story you wish to tell. An example of a storyboard can be seen below.
Remember though the visuals are important, the main thing an infographic should be doing is conveying information that is heavily researched and credible. Think of using information and researching as you would for any other assignment. As with everything else make sure you have all sources you used cited on your infographic, this is usually placed at the bottom of the page. There is a huge amount of information out there that could be useful in order to design your infographics.