Hi aspirant 

thanks for asking your query as per your marks in nata you should back a government architecture college because cutoff for general category would be between 54 to 80 as per last years trend.Therefore you should go for the counselling of nata.

Its going to be combination of NATA and 12th board to get you admission into an Architecture college, more over You can go for the private one as the score is not that great but go for a good one if you are going in private. Hope you understand

All the best!