I suppose that now you have crossed the age limit as according to the official notification one should not be born before 2 July 2000 which means you are already crossed the age limit.

I suggest you to go for CDS i.e. combined defence services which offers same position as you will be awarded after NDA but for that you should posses a graduation degree in hand. Therefore according to me now you should focus on CDS and other defence exams.

Hope I have answered your query even though if you want to ask me anything than you can comment down.

I hope you do well in future.