Thinking, Fast and Slow is useful for judgement and decision-making, while Social Cognition: From Brains to Culture gives a tighter route into social cognition.
YaleCourses hosts Paul Bloom's psychology lectures, CrashCourse gives short reviews of core psychology topics, and American Psychological Association gives research and applied psychology context.
Speaking of Psychology and Under the Cortex are better for research-led topic choice than generic psychology clips.
Introduction to Psychology and Starting with psychology are structured starting points for broad psychology foundations and the vocabulary needed to discuss methods, evidence and limitations.
A good preparation pattern is one book, one lecture series and one research-methods habit. After each resource, write short notes on method, evidence and limitations.