A beginner can pick up the basics of playing guitar by looking at websites or consulting teachers for fundamental playing technique. He can then use chord charts, tablature and sheet music to increase his repertoire of songs and his ability to improvise,
To start, it's best to use a simple acoustic guitar, a metronome and a tuner to learn the basics. Ametronome is a device that provides a steady beat, and a tuner gets guitar strings in tune with one another. Use standard EBGDAE, starting from the highest-pitched string, tuning to start.
Starting to play the guitar is frequently painful for the player's fingers. Practice causes calluses to develop on the fingertips, making it easier to press down on the strings. When practicing, work on first producing consistent sounds when strumming the strings. Try different notes by pressing a fret and playing the associated string at the same time, without looking at the fretboard. It's important to be able to feel where frets are, and the markings on the fretboard aid in this. If the strings buzz or fail to sound, they are not properly fretted or a finger is preventing a string from vibrating. Once consistent notes can be produced, work on playing scales, arpeggios and chords.