>>If I buy something what should I buy.
I am not sure what you actually want to buy as you seem to have a laptop, an mp3 player and the music.
You say you listen to music in bed, so why not listen to the music direct off your laptop? You can store music files on your laptop and then use something like Windows Media Player to play the tracks.
Or do you mean you want to buy an mp3 player?
If so I bought my wife a Sony mp3 player from Argos which was easy to use and came with full instructions.
See here
http://www.argos.co.uk/static/Product/partNumber/9082359.htm