did my 12th percentage 59.6 % affect me further if got a good inst. in campus placement

Yes of course but if u get a good institute, concentrate and work harder to gain more marks and knowlege when u are ready to face the campus placement interviews

you shud work hard further, if the stream you choosen is of ur hearty interest you can get through it,more over these days communication skills are very important than marks you secured while facing an interview.all the best.................