There are many different ways to begin your research, and the best approach will depend on the specific topic you are researching and the resources that are available to you. Here are a few options that you might consider:
Making a list of all of the sources you know for your topic: This can be a helpful way to get a sense of the types of sources that are available and to identify any gaps in your knowledge.
Doing a library walk to determine which sources are best: If you have access to a library, you can browse the shelves or search the library's catalog to find books, articles, and other sources that might be relevant to your research.
Beginning with an effect and listing the causes that you know: This can be a useful approach if you are trying to understand the underlying causes of a particular phenomenon or event.
Creating a web diagram after some initial Internet research: This can be a helpful way to organize your thoughts and to visually map out the relationships between different pieces of information.
Ultimately, the best way to begin your research will depend on your specific goals and the resources that are available to you. It may be helpful to try out a few different approaches and see which one works best for you.