1. If you have appeared for 1st group only:
a. If your papers were not that good, you have only one option to start studying again for the next exams without waiting for results. Be honest with yourself.
b. If your papers were very good and you are confident to clear: Start preparing for 2nd group without wasting these 2 months.
c. If you are under dilemma and your fingers crossed, then at least start studying 2nd group and prepare a strategy, in case you failed at least you will prepare for both groups in next attempt.
2. Appeared for both groups:
a. both were good and chances are there to clear both, then start studying that part which is common in IPC and CA FINAL like AS, Amalgamation, Marginal Costing, Standards on Auditing, etc. Don't waste your time because time is always less for CA Exams.
b. 1st group was good, 2nd was poor:
Start revising 2nd group and also identify what's the problem. if you lack conceptual clarity better join classes and start afresh and to self-study and waste your time because, without conceptual clarity, you cannot clear 2nd group.
If you are confident on concepts start self-study and join test series to keep a track on the study and give target to yourself.
c. Both were not good:
Consult your teacher where u took the classes and identify what went wrong and what are your weakness and start studying according to weakness identified. But don't waste your 2 months.
In short in all above situations, you should use 2 months. No situation can justify to wait for results and do nothing in 2 months except enjoying on fathers money.