Try searching the UNCW library catalog for books related to your topic. You can try film as one of the keywords and then choose your general topic as the other. For example, if you are looking for information about gender, search film and gender. Or if you are researching political issues, try film and politics. Books can be good general resources, particularly for background information.
Below are some databases that could be useful for you in your research for this class. They include sociology and film studies databases as well as some multidisciplinary databases. This isn't a comprehensive list, but it should get you started!