a good place to learn anything is on this website. they have classical guitar lessons, if you want to start from there, but im guessing you wont. its less gratifying becasue no one knows what your playing, and most people who first start playing guitar want to play songs for their friends. granted, thats alot of people.

when i want a tab for a song, i just go to google.com (its my homepage, makes it even easier) and type for instance "hit the lights guitar solo by metallica" or whatever, and it comes up with anythying that matches that query. its much better than surfing a single site, because they might not have it, or might have an inferior version that you can find on another site. just go to google, type "seven nation army guitar tabs" and tons of links will come up.