Do not go for selective study of psychology-1 at all.
Check out the 2013 paper, it was totally conceptual. Even most confident aspirants sitting beside us were thinking how to formulate exact answers.
Just go through all material and get yourself equipped with only the concepts of all topics.
No need of rote learning at least in paper 1 because everybody would write the same bookish material on schools of thoughts and motivation etc.
P.S : To be more on safe side, try not to do questions on
Schools of thoughts and
introduction,types of psychology..
. They would not work as marks makers for you.