Hi,
For doing CA you will need to register yourself with the Institute of Chartered Accountant ICAI India through there official portal www.icai.org
Next you will have to give Foundation Exam and after clearing that you are eligible for giving Intermediate Groups in next nine months. There are two groups with 4 subjects each.
Also in the mean time you will have to do ITT and OP trainings before getting registered for articleship which is of three years. Articleship is done under a registered ICAI CA member or firm.
After 2.5 years of articleship you are eligible for giving Final exams. But before giving that you will have to do Advanced ITT and GMCS training. Those certificates are necessary in CA Final documents.
In final also there are two groups with 4 subjects each.
After that you will have to complete your articleship and once you have cleared the papers you are a CA degree holder