same way as growing oaks fast impossible

there is no super fast way to learn English it depends on you and how easy or difficult you find learning a language. but I would recommend taking lessons on italki and finding a language partner to practice your English with. also try looking up English resources a good site is memrise it can help you learn a lot of new words.

Te recomiendo "El Ingles Americano Sin Esfuerzo" por Assimil.