ive been playing for years,,,,, but never been dedicated tbh
i spent 2 years trying to learn sweet child of mine from a book,,,,, from listening to it and just couldnt get it at all
i accidently found it on youtube and was shown what fingers to use ect and now i can finally play it
YOU TUBE is the quickest way to learn how to play BUT you wont be a actually muscian but it will still be impresive when your with mates ect playing famous riffs out
oh and oasis chords are also a good thing to learn,,, not that difficult and again spoon fed on you tube
do a search on "come feel the noise" and it will show a good change that noel does to make the cords far more impresive
ps: the only thing you wont learn on youtube easy is apagios,,,,,, but they are just too fucking hard
oh and learn "blues box" and general petonic scales to help your fingers move around the guitar and in a year you will look like slash to all your mates,,,,,, unless they also play guitar