You are having a post graduate degree in commerce and I feel it may very well enable you to try a job in the line of finance, accounting and company affairs.
Today there are many job opportunities for commerce people and you can try in the following areas -
Banking and accounting, Auditing, Funds management, Electronic marketing, Management consulting, Stock and share market related.
In addition UPSC also recruits commerce postgraduates in various vacancies time to time. One can also attempt in that.
There are various courses including PhD which are available after MCom and they prepare one for more prospective jobs like in microfinancing, derivative trading, investment banking etc.
This was for the area where you have core competency and now coming to your aptitude. It is also necessary that if a person pursues a job of his choice and commensurate with his aptitude he will relish it.
So if you are interested in teaching you will have to pursue BEd or go for PhD after which you can apply for lecturership.
Knowledge is power.