That is impossible to answer because it depends how easy or difficult you find the topics and how much time you have available for studying.
If it is the only exam you are taking then there is enough time to prepare for the March 2021 exam, provided you start studying now and are prepared to spend on average 2 or 3 hours a day studying. Make sure that you schedule to finish studying about 2 weeks before the exam so that you can then spend two weeks working through all of the questions in your Revision Kit. (It is vital that you purchase a Revision Kit from one of the ACCA Approved Publishers because it is full of past exam and other exam standard questions. Question practice is essential for passing the exam.)