hi Gautam,

Its okay if you got 58.65 in 12th. candidate from any stream after passing 12th can apply for NDA. Give Entrance test (National Defence Academy & Naval Academy Examination)  conducted by UPSC which consists of objective type questions are related to Maths and General aptitude.  Shortlisted candidate then have to clear SSB round + Group task, Presentation and psychological test.

I hope this will help!!

all the best for the future!!