I'm not the best with english, but I want u to tell some advices that were useful for me, because you remind me when I listened songs, I like rock balads in english, and I didn't understand nothing or when I had listening exams x_x. Well, I recommend watch series in english, and use subtitles, so while you listening you read in your mind the words, and when you watched at least 4 chapters, sometimes try don't see the subtitles, and the same with songs, you have to repeat and sing, you have to copy the singer pronunciation, you'll get learning phrases of the songs, and with the series you'll get open your hears , I recommend you FRIENDS it's a comic serie. Good luck!