A research question might:
Source: Williams, Robert C. The Historian's Toolbox: A Student's Guide to the Theory and Craft of History. Second ed. Armonk, NY: M. E. Sharpe, 2007.
It's normal to start out broadly.
Pre-research and exploring is the crucial first step when developing your research proposal. While you may have an idea or topic of interest in mind, the research question isn't a question you make up at the top of your head. You will need to do some reading to find an angle to pursue, and, even then, your question may change as you find more information. Let your question be guided by research.
I recommend digging into both secondary and primary sources to see what kinds of ideas you might be able to pursue before actually writing what you propose to research.
Too broad: African Americans and the Civil War
Too narrow: How were African Americans participating in the Civil War in eastern Kentucky in June of 1864?
Just right: How did African American participation in the Union and Confederate armies change during the course of the war?
Source: The History Research Process guide from the Newton Gresham Library (Sam Houston University)