I have passed 12th with nonmed n m intrstd in computer wana software engineer bt i hvnt give jee mains wt shud i do

U are having to options either prepare for the JEE and get good score and on the basis of the merit of JEE u will be elegible to get admission in certain good NIT's or IIT's. Otherwise on the basis of ur qualifying exam u can also get admission in certain private colleges/institutes which provide be

Still you have option one of my friend has recently taken admission in Lovely professional university and got scholarship too based on his 12th percentage. It is a best university, you can try there.you will get admission if you are lucky enough.