If you're comfortable playing left handed, then do it. I tried to learn right handed when I was 18 and just couldn't do it, then when I was 34 I eventually learnt left handed.

You will only find 1 or 2 left handed guitars in the shops (if you're lucky!) but don't let this put you off, you can always order a left handed model, if necessary. As for learning material, where it says right hand technique for us lefties it means left and vice-versa.

It's not difficult being a left handed guitar player, believe me!