It's very easy to download music. You will download the itunes programme and plug in your ipod and it will download it all.
I have a nano and a touch and pretty much gave up using the nano once I got the touch as it can do so much more.
Seriously, I wouldn't be without an iPod of some sort LOL I exercise to it, drive to it, have all sorts of info on it, access the 'net on the Touch and have lots of aps for the touch. If something happened to it I would make a special trip to go and get one right there and then ... and for me to do that it is a 500km round trip!!