What kind of listening have you tried so far? Any specific tasks? Based on authentic or non-authentic materials?
If your listening skills are of relatively low quality, I'd recommend trying non-authentic and scripted materials at the beginning.
If you like songs, try The Beatles.. it's easy to find their lyricsin the Internet and they have a very clear pronunciation.
hould you have any further questions, ask.
Hope it helps,
Student or Learner