it requires a bit of perseverence because its painful in the beginning. Your fingers will be sore and red bu after a few weeks of constant playing, you should become immune (i.e skin peel >>> callouses). I think its very worth learning. I like it much more than tinkling a kepboard or a piano...
learning from the net is not bad if you're not too serious about it all. Just learn the basics about the strings, notes, frets (the lines separating the long thing). Once you have that, tabs will be the way to go. If you are serious, then music theory is the way to go (very tedious and i hardly know a person who can be bothered learning guitar theory to read music).