A chord is a group of 3-5 notes that sound good when played together.
Keep your hand and arm flexible and put your thumb behind the fingerboard in the middle of the curved neck, then find the best way to reach chords - keeping thumb centred underneath the keyboard. Keep your fingers close to the guitar, and curved outwards; not collapsed in. A good exercise when you don’t have your guitar, is to make a circle with each finger at a time - with your thumb, and squeeze hard.
To learn each chord, place your fingers one at a time, and strum down. Then try lifting and replacing them, keeping strumming, until you can do the whole chord well. You have mastered the chord when you make its shape quickly.

THREE POINTS TO A GOOD SOUND