<-- taught myself
Get some tablature/chords. Learn all the chords. Keep it simple. You'll learn as you go. Be patient. Making bridges for the first time sucks, hurts, is difficult, etc.
What makes a folk guitar different? What do you mean by folk guitar? There are acoustic guitars (steel string), classic guitars (nylon string), electric guitars ... I'm not sure what you mean by folk guitar. Most country/folk style will use acoustic. Nylon strings are easier on the fingers. I've got 2 classic guitars, one electric and one acoustic. The nylon is the easiest (on the fingers) to play, and easiest to tune. The electric is by far the hardest to tune.