So you want to play the guitar. That's a fine hobby and you'll be sure to amuse yourself and others with your performances, provided that your instrument can emit a coherent tune. That can be hard because pressing the right strings down to form the chords is tricky, especially if you have arthritis or some other limitation with your hands.
YouTube user WayOutWest has a solution: the Chordelia. It's a wooden contraptions that attaches to the neck of your guitar. There are 5 levers on it, each marked with a chord. To hit the G cord, press the G lever and Chordelia squeezes the fretboard appropriately.