Listening to lots and lots and lots of English is super important for training your brain to understand English - especially understanding those tricky native speakers!!
So pick a topic you are interested in and listen to this podcast on the bus, whilst walking, whilst doing the washing up, hoovering, sleeping, picking your nose - whenever! It doesn't matter that you don't understand everything, that's normal. Just listening regularly will help your listening skills so much.
I hope you find something you enjoy! :)