F1

Give it about three weeks/month to study syllabus, because it's a wide course, there is not much point (unlike computational papers concerned more with technique and application ) in delaying the exam once you've adsorbed the main content.

As well as studying the notes you should try lots of practice questions (buy a question book from BPP, Kaplan or Becker). It's impossible to say how long you will need because students differ so widely on how much time per week they devote to studying and also in learning rate. However, if you have a question book you will be able to judge your own progress. (PS when doing questions, don't mark the question book so that you can repeat exercises without clues on the questions.)