how 2 prepare 4 cat exam??should i join a coaching institute and rely on them or i should prepare myself?

For better preparation you need to join any Coaching Institute for CAT exam. Best institutes are IMS and TIME.

First of all try to know the pattern of questions according to the syllabus......and make notes of the following chapters from where most of the questions comes and then prepare yourself....it's much better choice or if you want to do coaching then firstly take demo classes.

if you go for coaching it bette.otherwise you can study yourself.collect basic notes and more.