It's important to begin your research learning something about your subject; in fact, you won't be able to create a focused, manageable thesis unless you already know something about your topic.
Do a Little Background Reading:
This step is important so that you will:
Reference sources are highly-credible sources filled with thorough yet concise discussions that let you know the “who, what, when, why, and where” information on your topic right at the start of your research.
New knowledge inevitably leads to new questions.
Think of a television program involving a criminal investigation. Experts arrive on the scene to answer a fundamental question: "What happened here?" But their investigation merely begins with that basic question. Soon they are finding themselves answering more specific questions in order to figure out what happened. Who all was involved with the crime? When did it happen? Where did it happen? Why did it happen? Were there any witnesses? It is only by answering a series of smaller questions that they are ultimately able to see the big picture.
A researcher investigates a topic much like a detective investigates a crime. You may start off with an overriding question but you'll soon find yourself asking many more questions on your journey.