Once you’ve chosen a topic and acquired enough source material to support it, read through each source (thoroughly, this time) and use the information you learn about the topic to begin constructing an outline for your paper.
What are the major themes you need to explain for your reader to understand the topic?
Will your paper follow a chronological story or timeline?
Pro Tip: Write your introduction and conclusion last. The body is where you share evidence and make arguments. Your introduction will preview and summarize, respectively, what that overall argument is. You won't have a clear sense of the overall argument until you've written most of it out.