Spend almost SIX weeks, and try to comprehensively cover Four Modules Listening, Reading, Writing and Speaking.
Numerous preparatory books are available in the market, but purchase the official preaparatory material from Cambridge University fisrt, later you can try on other titles as well.
Get the detailed guidance about registration with British Council Islamabad.
Plan to devote at least 2 hours practice time Each Day.
Practice is the key to success dont be over confident.