The problem with the question is that the term "Expert" is subjective. I would argue that the term expert would mean that the person would hold not only a doctorate level of knowledge (Don't read education, they're completely different) but also at least several years of experience after having gained this knowledge therefore there is no such thing as an "Expert Photographer" NO photographer, no matter what YouTube tells you, dedicates themselves to an extensive knowledge of ALL thinks photography. Everyone finds what they like and focuses there. Yes we all dabble in more than one area but not to the extent to be an expert. Reading a book, watching a video or learning a thing is great but without the extensive practice behind to truly understand all the little details you can not call yourself an expert. Even further I would laugh in the face of anyone that proclaimed to be one. Stop focusing on a title. Be the best you can be. If you really need a title, Photographer.