The main aim is to be comfortable and have easy access to the guitar fretboard. A music stand will also be helpful.
Use a wide guitar strap and adjust it to a comfortable length.
The right hand is used to play the strings by plucking them with a pick. A pick is a piece of plastic shaped like a triangle.
Hold the pick lightly between your thumb and first finger, as shown in the following photo.
Use the tip of the pick to play the string.