Dear Neelam,
In my opinion you have three options:-
1. To become a teacher: You can either try for B.Ed (for which u are getting experience) or JBT or ETT. These days the requirements for JBT or ETT are better in comparison to B.Ed teachers.
2. To become a lecturer : After finishing the postgraduation + NET....u can go for Lecturer in any University or college.
3. You can also join corporate sector after postgraduation in commerce.
Final decision has to be taken by you only taking all the aspects in mind. One can pursue postgraduation in commerce through correspondence but the affiliation of University etc. should be taken care of like affiliation, recognition with AIU (ASSOCIATION OF INDIAN UNIVERSITIES), UGC etc.and reputation of University.
Hope this will help you.
Vinod