Though I'm surely not an experienced player, I guess the best, as usual, is to start with easy stuff (easy rock stuff).
I'm far from being able to play the guitar WELL, but it's cool when you can sing along, even easy parts, and at least when someone comes to talk to you and you don't want to stop playing, you don't look like a total retarded who's got not enough brain to move his hands and play at the same time 
 
 
But yup', once again, it's automatism, and just automatism... (that's when I realise Alexi Laiho is REALLY good 

 )