It is important to remember that Delhi University is a central university. This means that neither the English-speaking elite of Delhi, nor the Hindi-speaking masses of the neighbouring states of Uttar Pradesh and Haryana have any grounds for special treatment.

Inorder to achieve your goals you ought to improve your English so that you can feel comfortable while attempting the DULLB exam . This would not only help you during exam but even after the exam in your colleges as well . English is an international language and if you want to really grow to a high level you should know how to speak and write in English . Consider it as a part of your syllabus . You can certainly improve your English by reading newspapers , watching English movies and taking English tuitions for better guidance  as well.

I am sure you will be able to do well with sheer guidance and determination and will not let English act as a hurdle to your future goals . All the best !