Study Guide and Important details to take note

Dear All,

After few years gap of not studying, I will be sitting for FR paper in March 2020. I have purchased BPP text and practice book. I read the first chapter and feel as if I need to memorize so many text and definition etc. Briefly I went through the study guide etc and feeling panic if I will be able to memorize whole text book.
Is there any guide and summary of main things I need to master, understand and memorize so I can be more focused?

In March 2020, I will be siting for 3 papers (FR,AA,FM).

Thanks in advance for all your assistance.