Hello Madhushree

As you mentioned your academics score,it is below than average and also you dont have any work experience.So,I would suggest you to give CAT exam next year.But i would also suggest you to do some job with preparing for CAT,because along with percentile and academics marks,your job experience also matters,so it will be very beneficial for you to do some job then go for CAT which will be a plus point for you.Also it will not create any hindrance next year if you do some work in your gap year.

Hope This Helps

Best Of Luck!!!