A slide, (neck of a bottle, knife blade or round metal or glass bar or cylinder) is used in blues and rock to create a glissando or "Hawaiian" effect. The slide is used to fret notes on the neck, instead of using the fretting hand's fingers. The characteristic use of the slide is to move up to the intended pitch by, as the name implies, sliding up the neck to the desired note. The necks of bottles were often used in blues and country music as improvised slides. Modern slides are constructed of glass, plastic, ceramic, chrome, brass or steel bars or cylinders, depending on the weight and tone desired (and the amount of money a guitarist can spend). An instrument that is played exclusively in this manner (using a metal bar) is called a steel guitar or pedal steel. Slide playing to this day is very popular in blues music and country music. Some slide players use a so-called Dobro guitar. Some performers who have become famous for playing slide are Robert Johnson, Elmore James, Ry Cooder, George Harrison, Bonnie Raitt, Derek Trucks, Warren Haynes, Duane Allman, Muddy Waters, Rory Gallagher, and George Thorogood.
With just a little more music theory, you can learn to write simple songs with the chords you've just learned. The song would be in the key of C major (C, D, E, F, G, A and B). You can use the major chords for the I, IV and V notes and the minors for the II, III and VI notes. That means you can play a chord progression which uses all of the chords you've learnt, if you want to.
The Guitar Program at Musicians Institute is designed to develop professional level technique and musicianship through performance-intensive and immersive experiences. Guitar classes are taught by leading professionals and students will get trained in the basics of guitar playing, including performance, ear training, melodic soloing along a huge variety of contemporary styles.