Spanish guitar is a loose term which folk use to refer to any acoustic guitar music with a Spanish sound
. Flamenco is the folk music of a specific area of Spain which is often confused with classical guitar because both involve a fellow in a suit playing a guitar with his nails. Flamenco has small in common with classical guitar as it is largely just the guitar accompaniment to Flamenco singing and dancing with guitar solos being a late development in this genre.
Classical guitar which is classical music played on a nylon string acoustic guitar with no cutaway at the top frets. The guitar is generally made from Rosewood for the sides and back, and Cedar and Spruce for the front.
Classical guitar is strongly associated with Spanish composers from a couple of different times of history and the prime mover of classical guitar methodology was a Spaniard by the name of Andres Segovia.
One of the attractions of Spanish guitar is that it is just the guitar and you. No kit aside from your instrument is necessary, and the music you produce is the result of your practice. Whatever your definition of Spanish guitar music, there are plenty of pieces that've been published and are within the reach of the dedicated newbie acoustic guitar player. This implies if you're employed reasonably hard you will have a half-hour or so repertoire in a few months. When you get to that stage you will be quite an incredible Spanish guitar player.
Spanish guitar is one genre where you really need to take lessons from a live teacher. The difficulty is you may have to travel to another area to learn it. If time and budget don't allow you to take lessons, get a copy of the book, Solo Guitar Playing by Fred Noad. It has all the basics you want to learn and pieces you can learn as your technique moves on. remember to keep an eye fixed on the video websites for any lessons in Spanish guitar you can get.
Another book of Spanish guitar music you should go looking for is A New Tune A Day For Classical Guitar. It has pieces from the classical guitar heavyweights like Sor, Bach, Carulli and Carcassi plus some other tunes like Scarborough Fair and Amazing Grace.