Use Holman Library One Search to get a sense of the issues connected to your core topic.
If my starting topic is recycling and I know plastics recycling is one aspect I'm interested in, I can type in recycling AND plastics (see image) to find ideas to add to my concept map. One or more of them might become the focus for my essay, while other parts of the map may become sections of my paper.
(click on image to enlarge)
Map out aspects of your topic. You can include specific aspects you know about or broad areas you need to know more about.
This page is designed to help you begin to map out dimensions of your topic.
That serves a few different purposes.
Keep in mind that research is a process. Topic and keyword mapping can help you at any stage of your research.