If you want to pursue MBA as your interest you can do it or you have also one another option if you belong from CSE branch in B.tech you can improve your one skill like web development you can do it easily because in India job for web development is a very decent salary.

According you want to pursue an MBA that mean you have a keen interest in marketing that's why you want to change your field, Try to give CAT exam and starting pursuing MBA master is best better than a bachelor degree.

All the best dear