Hello Kashish

All of the three exams within the CFA program are designed as a self-study curriculum, but you can study it yourself or can take coachings for it.
There are other fews things that you should consider for better preparation.

• Time: the earliest you start, the more time you'll have to cover all the topics, from top to bottom. The more familiarized you are with the curriculum, the better, and for that you need time.
• Knowledge: it's a long exam and they ask everything. Study well and know the curriculum, you'll have 1,5 minutes on average to answer each question, you have to be quick.
• Practice: you are not going to pass the exam if you read only. You have to test yourself with exercises. Go through with previous question paper or mock tests.
• Commitment: make a study plan and commit to it. Follow it and make the correct adjustments when necessary.

Best of luck