Hello,

MA English polishes ones written skills and it is helpful for competitive exams moreover commerce is your main field so it will be better to keep your hold on what you have by not worrying about what you want to acquire

every institution or university have their own rules and code of conduct some universities conduct the entrance examinations and some grant you a seat on the merit basis

you need to have grades or marks according to the Eligibility criteria of the college and university

so clearly go through the information provided by the institution in which you are willing to apply

If you are really interested in English literature do it as an additional MA your main focus should be that field which can give you good earning

Hope it helpful

Thankyou.