I learned English by adjusting my environment (i.e. my room and my workstation) so that I listened, read, played games in English all the time. You know, as if I were actually living in a country where that language is spoken. For example, something that helped me a lot was to change my computer & mobile languages to English instead of Spanish (my mother tongue).
You can watch shows in your target language, listen to music in that language, play text adventure video games in that language, meet native speakers and hang out with them. If you do this, you will improve very quickly.