Have you checked out this guide on the Science Buddies website? http://www.sciencebuddies.org/science-f ... ates.shtml
It gives a pretty good description of how to identify whether growth on a plate is a mold, fungus, or bacterium. Molds are generally whitish/grey and fuzzy; some fungi can be as well. However, some other fungi, like yeast, look very similar to bacterial colonies. One thing you can do is if you have access to a microscope, you can resuspend a colony into some broth, spot some onto a glass slide, and look under the microscope. Typically, bacteria and fungi should look pretty different under the scope. However, if you don't have access to a microscope, then following the guide that I sent you and trying the best you could to identify the different growths is already great!
Let us know if you have anymore questions.