Learning has no end in one's life. I appreciate your decision to continue your education.
Doing an MBA through correspondence is a good idea. However, your undergraduate degree also holds great value. You should not assume that completing an MBA through correspondence alone will lead you to great heights.
Your career success is also influenced by your communication skills, writing abilities, ability to elevate an organization, meeting objectives, and fulfilling commitments. An MBA can assist you in developing these skills. Additionally, some prominent companies in India and around the world do not consider a correspondence degree as valid; they prefer candidates with regular degrees.
Therefore, instead of waiting to complete your degree, consider joining a company first and then pursuing or continuing your MBA. This approach will likely hold more value in the long run.
Before enrolling, make sure to check the details of the personal contact program (PCP) classes. For instance, at Madras University, PCP classes are held weekly. If you are in Bombay, you may find it challenging as these classes may only be available in Tamil Nadu.
Wishing you great success in your career.