How can I research for my EPQ

This is a tricky question as there are so many ways to research. Firstly, you should decide specifically on what you specifically want to write about and research. Once you have that, googlescholar is an excellent way to research academic articles, especially for a topic which requires modern academic literature. Also, JSTOR has a similar feature for academic writing. For historical or less modern fields of research, a school or local library can be perfect for finding texts on your topic, whereas these can sometimes just be an overview of the topic, and academic articles provide arguments for you to agree or disagree with. If your topic is modern, reliable new articles such as those in the Independent, or the Times can be useful for recent data.