go and learn back "han yu ping yin", those bo po mo fo, de te ne le those. i will start teaching a ABC in this saturday. he wanna learn mandarin conversation also. he's about 30++ yrs old, so it's not too late for u to go tuition

listen to radio now i think might not help much, coz u duno what they are speaking? or u can catch all the time wat ppl say but only can't speak? tv got human beings show u their intonation, with their movement of mouth, gesture, emotions, u will learn more from there