The commerce is one of the three basic and broad fields of the education. Another two are the Science stream and Arts/Humanities stream. You can join the government sectors or the private sectors.
Some major industries where commerce graduates can find jobs are Banking, Accounts, Insurance, Management, Investments and many others.
You can be a part of the corporate world as the analyst, executive, banker, Sr. executive or manager. There are a lot of job opportunities in the commercial field.
You can choose one of the below fields as per the specialization of your degree:
Mathematics and Statistics
Hope this helps.