Even if newspapers, magazines and the Internet didn’t exist, you’d still have a job keeping up with reading all the books out there. In your entire life, you’ll read fewer books than the number of books that get published this year alone.
Point is, you can never grab all the information out there and you can never be 100% prepared for a new venture. Whether it’s an essay or an entire change of lifestyle, you can’t hope to have access to absolutely everything written on the subject.
Set a limit on your research. Don’t blindly reach out forever, otherwise you’ll never start the actual work. Reading all your life won’t write your essays for you, so there must be a time to move on.