I got my BA in Psychology. The stressors are similar to any field of study. But when you study psychology you will learn about different psychological theories, theorists, testing mechanisms, counseling, research, data analysis and statistics, and more. Psychology as a general field is huge and so you would learn the basics of psychology from a fundamental place until you specify a concentration and/or go for your Master’s or Doctorate.
Expect a lot of reading, a lot of research, a lot of writing research papers, and taking classes in psychological testing, theory, abnormal psych, basics of counseling, statistics for psychology and research method and design to name a few.