You can definitely get good job with commerce stream. Just do the hard work and attain deep knowledge.
After 12th you can do CA, B.com,BBA,BCA
The career opportunities in commerce stream lies in larger fields like teaching, financing, finance advising, tax advising, insurance and stock marketing.
And also you can get job in banks, CA office, private company,Govt.Company.
The main subjects included in humanities stream are-History, Geography, Psychology, Political Science, Sociology, Economics, Sanskrit ,Philosophy ,Anthropology .
In each school the electives will be different. It depends on the school that you study. Anyway score good marks then only you can get into top arts colleges in India as nowadays competition has become tighter.
With specialisation in humanities, you may choose to become an historian, geologist, psychologist, sociologist or economist depending on your choice of subject at college and University .