David Grier, another gifted player who was a child protegee' of Clarence White, was once asked "If I only have half an hour available to practice after work each day, what should I work on?" David didn't miss a lick. He answered "You should work on changing your job so that you have more time to practice.
On the O-Dot issue of hand strength, a strong grip is the sign of someone who has not progressed yet. Maybe because they've been spending too much time with ODot's favorite instrument.
Novice players tend to play with light or medium picks, which are more forgiving of the grip than heavier picks. When you've managed to get to the point where you actually have control of the pick and the picking forces, you can move on to heavy picks, and these tend to give a more pleasing tone.
The best players have a very light touch with both left and right hand. This is stuff that a good teacher can help you with.
Seriously, it's not just a matter of callous formation. If your wrist angle is poor, you can really mess up your hand.
Andres Segovia said (not to me
) that the thumb is always curious about what his brothers, the fingers are doing, so he tries to sneak around the neck to take a look. You should not let him do this. The thumb should remain on the bottom side.
Admittedly Segovia was playing a classical guitar, and they tend to have flatter, wider necks. But this is generally good advice for any style of guitar, and any neck.
Probably one of the easiest and simplest guitars to play is the Telecaster. It is a Nashville standard. It's very simple to set up. It's very versatile, and in the right hands, it can be used for any style of music.
There is a pretty big difference between acoustic and electric guitar string forces. If you play an electric, you will generally need to have a pretty light touch to get clean true tones.
It is natural for many folks to choose an acoustic since no amplifier is required. But acoustics made from solid woods are more sensitive to humidity and temperature than a solid body guitar, like the Telecaster.
If you've got smaller hands, you might want to consider an Epiphone Les Paul knock off. The Les Paul fretboard is based on the 24 3/4" scale, and so the frets are slightly closer together than the Telecaster's 25 1/2" scale. It's not too big a deal once you get up the neck a bit, but in the first position, the shorter scale is a bit easier for people who don't have large hands.
There was a guy named Tal Farlowe who had such large hands that his nickname was "The Octopus." J. D. Simo's hands remind me of Tal's.
Guitars are fun on many levels. No one is going to collect 20 pianos, if for no other reason than the fact that they take up a lot of space. Many people who fall in love with the guitar end up going through 20 or more guitars. They don't take up too much space, and they're all different.