What can I study as a layman to learn enough facets of psychology to develop better understanding of human behaviour? Unfortunately as I know nothing of the field I'm not really certain about what I should even look for. Any suggestions such as subjects, books, documentaries and even advice would be appreciated.
I am interested in topics such as personal fears, prejudices, motivations, mental health illnesses, hostilities, etc. On a larger scale I want a better understanding of social issues such as resistance to change, radicalisation, extremism, value systems, group dynamics, etc.
Thank you.