Colleges in Kolkata

I have also did B. E. In Mechanical Engineering in 2017 and I am pursuing M. Sc. in Mathematics. After B. Tech. /B. E. you can do B. Ed. by taking admission in any college. Most of the prestigious universities conduct entrance exams, so you can prepare for these. State level common entrance exams are also held. For doing the course through distance/online mode, IGNOU conducts entrance exam for B. Ed. while some universities offer direct admission, some demands teaching experience. In new education policy, the B. Ed. will be of 1 year duration after master's degree and that of 2 years after Bachelor's degree. Currently it is of 2 years duration after Bachelor's /Master's. You can teach only in middle school (6-8) on the basis of B. Tech and B. Ed. If you still are interested in technical studies, I will suggest you to do M. Tech /M. E. and try to teach in an engineering college. If you are interested in Science, then you can do M. Sc.
I hope the answer will be helpful to you.