For example, if the note E (the open sixth string) is played over the A minor chord, then the chord would be [0 0 2 2 1 0]. This has the note E as its lowest tone instead of A. It is often written as Am/E, where the letter following the slash indicates the new bass note. However, in popular music it is usual to play inverted chords on the guitar when they are not part of the harmony, since the bass guitar can play the root pitch.

If you know how to play an E major chord, then you know how to play an A minor chord—just move the chord whole shape over a string. Make sure your first finger is curled, so the open first string rings clearly. Avoid playing the open sixth string when strumming the A minor chord. There are situations when it makes sense to reverse your second and third fingers when playing the A minor chord.
I have checked out Justin's site and found it to be comprehensive and informative. I have always felt that learning about music and especially music theory applied to the guitar, is helpful in finding your own unique voice on the instrument and expanding your creative horizons. Along with his insight into teaching and his fantastic abilities on the instrument, Justin has created a powerful go-to-place for anyone interested in exploring the instrument to their potential. Just don't hurt yourself.
The ratio of the spacing of two consecutive frets is {\displaystyle {\sqrt[{12}]{2}}} (twelfth root of two). In practice, luthiers determine fret positions using the constant 17.817—an approximation to 1/(1-1/ {\displaystyle {\sqrt[{12}]{2}}} ). If the nth fret is a distance x from the bridge, then the distance from the (n+1)th fret to the bridge is x-(x/17.817).[15] Frets are available in several different gauges and can be fitted according to player preference. Among these are "jumbo" frets, which have much thicker gauge, allowing for use of a slight vibrato technique from pushing the string down harder and softer. "Scalloped" fretboards, where the wood of the fretboard itself is "scooped out" between the frets, allow a dramatic vibrato effect. Fine frets, much flatter, allow a very low string-action, but require that other conditions, such as curvature of the neck, be well-maintained to prevent buzz.
the fifth, which is a perfect fifth above the root; consequently, the fifth is a third above the third—either a minor third above a major third or a major third above a minor third.[13][14] The major triad has a root, a major third, and a fifth. (The major chord's major-third interval is replaced by a minor-third interval in the minor chord, which shall be discussed in the next subsection.)
With the C major chord, put that shape on the guitar for thirty seconds, take it off, shake it out, and repeat the process a few times. As you’re making the shape, remember to come right behind the frets on the tips of your fingers. When you’re starting out, you may have to place each finger down one at a time, but that’s natural. You’ll get better with time and eventually be able to go right to the chord.
This unique degree program combines contemporary music performance training with the rigorous study of traditional disciplines including sight-reading, music history, arranging, conducting, recording and more. The comprehensive program instructs students to demonstrate stylistic depth, creative maturity and professional competence in preparation for careers in today’s music industry.