What is the hardest thing about finding information?

The hardest thing about finding information and doing research on a topic is finding information that will really help me in terms of the relevancy to my topic. This summer, I will be working on my Extended Essay for IB, which will require a TON of information... but what would I even narrow my topic of perfect pitch down to? and how will I find enough relevant information? Often times, finding a good topic is the most difficult part for me. So far, this library course has helped in terms of showing me how to narrow things down. The plagiarism was a good overview, but it's stressed so much in the IB program that I am sure to always double check my citations. Also, the false information was mostly common sense; I went to Challenge School for Elementary school and we had a technology course that stressed the importance of false information on the internet. Although it may have helped some people, it is already stressed so much in the kind of work I do. I think it would have been more useful if we had gone more into depth on research help. For example, in research papers or papers in general, I have trouble with thesis statements and finding topics. Although thesis statement is more english than library, a small overview may have been good. Also, finding a topic is crucial to a paper - without a topic, what can we do? Also, a good paper is generally not too broad. My topic of perfect pitch would be far too broad for the kind of paper I am writing about. Exploration on how to find different branches of topics would have been helpful.