Every beginner hits the same wall. Someone calls out "four, seven, two" and you have no idea what just happened. Three numbers? In tennis there are two. In ping pong there are two. Why does pickleball need three?
Here is the whole system. The score is always called as three numbers: your score, their score, and which server you are. "Four, seven, two" means your team has four, their team has seven, and you are the second server. That third number is the part nobody explains.
In doubles, both players on a team get to serve before the serve passes to the other side. Except at the very start of the game, where only one player serves. That exception is the source of half the confusion in beginner pickleball.
Walk through it. Your team serves first. Player one serves. If your team wins the rally, you score a point and the same player keeps serving, switching sides each time. If your team loses the rally, nobody scores. The serve passes to player two on your team. The score is now called with a two at the end. If player two also loses the rally, the serve goes to the other team entirely. That is called a side out.
The key rule underneath all of this: only the serving team can score. If you win a rally while receiving, you do not get a point. You get the serve. This is called side out scoring, and it is why games can feel long. You have to earn the serve and then hold it.
Singles is simpler. One server per side, so the score is just two numbers. Your score, their score. The server number disappears because there is no second server.
Games go to 11, win by 2. Tournament games sometimes go to 15 or 21 with the same win by 2 rule.
The fastest way to learn: play three games and call every score out loud, even when you are unsure. Someone will correct you. That correction is the lesson. Within a week you will call scores without thinking.
Next in the Primer: the kitchen explained, the strangest rule in racket sports and the heart of the game.