Hiya!

In terms of the old favourites, try something like 'Knockin' on Heaven's Door', which is about as easy as it gets. Then there are bands out there whose entire catalogues are easy to play (the Ramones come to mind), and you can pick and choose from them.

Other classics that are really easy to try out include Wild Thing (the Troggs), and 'Wish You Were Here' by Pink Floyd.

Recent tunes like 'Seven nation Army' by the White Stripes or 'Time of Your Life' by Green Day are a good way of boosting your confidence by learning something simple. It certainly beats me as a 12 year old trying to figure out 'Hangar 18' by Megadeth and failing miserably ;) I'm 31 now and I still have trouble with it...lol

Oh yeah, the Johnny Cash version of Nine Inch Nails' 'Hurt' is fun and simple to play too- try that one on for size :)