Volleyball is a team sport. There are 2 teams, 6 players on each, that are separated by a net. The object of the game is to get points by making the ball land on the floor on the opposing team's side of the court.
The game starts with a serve, from behind the back line of the court, on to the other team's side of the net. You can serve underhand or overhand. This photo is an example of how to serve overhand.
When the ball gets on your side, you must not let it touch the ground. Each team gets 3 hits, but one player cannot hit it twice in a row. These 3 hits are usually a bump and set to set up the attack, then a hit or spike to attempt to get the ball to touch the ground on the other side of the court.
That is called a rally, and a rally ends when a team scores a point by getting it to touch the ground on the opposing team’s side, or committing a fault. A fault can be a team getting 4 hits rather than 3, touching the net during play, or stepping over the end line when serving.
The team that wins the rally receives a point and gets the serve. There are 2 games, sometimes 3, and whoever wins 2 is the winner of a match.
Volleyball is a very competitive sport, but in the end it's all about having fun with your team.