you may find it useful speaking to someone who already speaks english, either online or offline. also, the usual advice is to sing songs in english whilst listening to them, read aloud and say the words out loudly when you are writing them, and generally keep practising your pronounciation. listening to native speakers could help you with this through either conversation or watching television programmes and english/american films or even listening to the radio! you may find the 'find a language partner' section useful on the italki website so that you can find someone to practise with! good luck :)