How to Hold an Electric Guitar
Right guitar positioning is the one that feels natural and comfortable to you, with your muscles relaxed and no unnecessary tension. Often, beginner guitar players lift their shoulders in a strain without realizing it.
In my opinion, the best way to learn to hold a guitar is to watch yourself in the mirror and work on getting rid of all the tensions. It's also worth doing when you begin playing, for some time in order to develop good habits.
I recommend learning to play in both a sitting and a standing position.
Playing in a sitting position is easier, but a standing guitarist looks more impressive and has more freedom for actions. He can jump, run around the stage, lean... Just imagine a guitar player who is sitting all the time at a rock concert :)
When sitting, I used to place the guitar on my left leg, as is typical in classical guitar positioning, because I first started playing a classical guitar. However, many folks find it more comfortable to place an electric guitar on their right leg, as shown in the picture below.
If you choose to play in the classical position, put some hard stuff beneath the left foot (or right one if you're holding a left-handed instrument); it could be a footstool, a piece of wood, or a couple of thick books. This will make playing much more comfortable.
Whenever you play, your hands must not help to hold the guitar, they should be free to play.
When you stand, use the guitar strap to hold the instrument. The strap goes from the top strap peg, via your left shoulder, diagonally across your back and returns to the second peg on the guitar.
Don't put the strap over your head like a necklace, it's uncomfortable as heck and looks stupid too :)))
Now that you've got acquainted with the guitar positioning, let's put the hands on the guitar. The left hand is the fretting hand and the right hand is the picking hand.
If you play a left-handed guitar, everything in positioning becomes reversed. Flip the instrument so that the guitar headstock looks to the right; now your fretting hand will be the right hand and the picking hand will be the left hand.