What should I do after B.Com while preparing for government exam?

Go with MBA or M.Com programme after B.Com programme. Government job preparation is fine but doesn't just think that this is the online one thing which you have to do, if you do master programs then the more good option will be opened for you.

You can go for higher studies, such as M.Com while preparing for government exams.

If you are preparing for government services competitive exams, you can go for higher studies through correspondence course with a private or government institute in a subject of your own choice. Also, you can take a subject which you require to study for the preparation itself. All the best.