how to hold the guitar
The guitar can be played sitting down with the guitar over the right thigh, which we refer to as the contemporary playing position. We can also rest the guitar over the left thigh, using a footstool to elevate the leg and support the instrument known as the traditional playing position. We can also play the guitar standing up using a guitar strap that attaches to the instrument.
Standing Position With Guitar Strap
Classical Playing Position With Footstool.
Traditional Seated Playing Position
It is important to play with good posture as to not develop long term back and shoulder problems while playing the guitar. The ideal playing position follows the 90 degree Rule which is an easy way to remember the correct posture. All of your joints in your lower body (ankles, knees, and hips) should be at 90o angles when seated.
When sitting down, the guitar should rest between your thigh and underarm with your elbow wrapped around the top of the guitar as seen in the picture below. When using a guitar strap, place both your head and picking hand through the strap, and adjust the strap so the guitar is at a comfortable height.

