There are many ways to learn the guitar. Either students enroll on guitar short lessons, study in a traditional school, or learn their own by reading a lot about guitar or watching videos online. This generation is luckier since Internet gave more free tutorial video lessons such us in YouTube or free guitar lessons from various websites. It is still best to learn from actual teacher who can actually demonstrate, but still many are able to learn from just watching videos online.
There are a lot of videos out there, goodluck to those who want to learn the guitar.