Nobody can learn a language without a dictionary. But no dictionary can order a cup of coffee or conduct a job interview. It’s dangerous to get addicted to your dictionary. You can only learn English well by relying upon your own abilities and resources. A dictionary is only as good as the person using it.
English is indispensable for your education, careers and self-edification. Learning keeps you young. The English you speak and write tomorrow is the English you study today.