I wanted to validate my hypothesis, and to do so; I started doing customer interviews. I would strongly recommend reading The Mom Test. That book helped me ask better questions to my potential users.
Finding users to talk with was quite comfortable in my case because everyone prefers to read.
I talked with around 20 peoples who prefer to read online, and I noticed that they were having a hard time recalling what they read. They do not have a proper system in place for this particular problem.