Take a look at the website of the British Council. There are a lot of exercises on there. For example: https://learnenglish.britishcouncil.org/en/word-street/history-scene-1

I think the best way to improve your listening skills is to watch movies and tv shows in English without any subtitles! Another good idea is to listen to English radio channels. If you don't have any of those in your country, then I'd suggest searching online. Audio books or interesting podcasts might also work and if you have an mp3 player (or just a phone) you could listen to them anywhere. Speaking is a bit trickier, at least in my experience. Perhaps you could try to find an English speaking friend online and have conversations in English, in skype for example?

Watch a movie in English while reading the English subtitles then record yourself trying to imitate how the person in the moves says the sentences and then check yourself by comparing what you said to what the person in the movie said. Then once you mastered the sentences try to use them with native English speakers.

By training. For example the listening skills, watch english movies, listen to english songs and so on And for the speaking skills, of course you need to speak it, and don't forget "practice makes perfect"

When I try to learn a new language I listen to songs and write the lyrics down. Then I'll try to memorize the lyrics and what they mean in my native language. Doing so adds to my vocabulary and understanding of sentence structure.