Dear I may not be a senior to guide you that much but let me tell you about my side.
I have psychology and i have covered it in 20 days with notes from just a single book named Psychology by Sundra K. Cicaralli. its very comprehensive book covered both papers except industrial psychology, you can do it from some other book or internet and rest Mcq's can be prepared from past 15 years papers or from Jahanger Psychology Mcqs..
That is very short and easy to prepare but tip of the day is that do not impress the examiner but express the examiner
and draw as much flow charts as you can before going to the details of a Answer because it will clear the details and reduce complexity and examiner feels good to see some graphics..
Flow Charts* and Diagrams* are key to success to Psychology Thanks