It is always good to start studies at early stage, However in your case it is too early to think about CA final studies. You have just completed your exams , So now take rest for a month and start searching for CA firm where you can complete your internship and then you enquire for ca final classes which will suit your office timings and place.
Your final attempt will be in May 2018, Only if you join internship soon after result (Search on ICAI.org for exact date). Search for the classes for CA Final May 18 attempt and accordingly start your studies.
Plan your studies well before so that you can get much time for revision.
Start reading habit as much possible like reading audit reports, latest amendments in taxations and other laws.It will definitely help you to clear your exam at first attempt.
It is always good to start with practical subjects like AMA , SFM or else go with the classes schedule and keep Revising, you will definitely get success. Wish you good luck for your future. **