Hello. The best way to improve speaking and listening is to speak and listen with native speakers. It seems like this answer is too easy, but it is the best way. Here on italki you can speak with native speakers.

You can learn it by watching western movies or films or songs. i always learn english with those ways. and my english is improving. whether it is speaking or listening. and if there's something that u dont understand. u could ask someone who does ^^