For anyone interested in learning about reading photographs and their meaning, there is a free online course set up by MoMA on the Coursera platform. It is a six week course, taking one to two hours a week. When you enroll it suggests a price of £37, but that is only if you want the certificate at the end. Without the certificate it is free. I haven't done this yet (just signed up) but have been impressed with other Coursera courses I have done, and the syllabus looks interesting. Won't appeal to everyone here, but I am sure there will be a few who will be interested. You can find it here - https://www.coursera.org/learn/photography.