I’ve been teaching myself the acoustic guitar online but I don’t know which songs are easiest?
where should i start?

If you know the basic guitar chords there are loads of nice songs you can play. Here’s a few:

Amazed by Lonestar
Breathing by Lifehouse
Clocks by Coldplay
Dreams by The Cranberries
First Cut Is The Deepest by Cat Stevens
Hallelujah by Leonard Cohen
Here Without You by Three Doors Down
Horse With No Name by America
Hotel California by The Eagles
House of the Rising Sun by The Animals
Pianoman by Billy Joel
Please Forgive Me Bryan Adams
Wonderwall by Oasis

This site has the chords for most of these songs and some other easy ones. It’s in an Ebook you can download…

http://www.pluckandplayguitar.com/easy-guitar-songs.html