Some sports rely on finesse. Some are built around tactics. Others have teamwork involved. Then there are those where overwhelming power and force provide the key advantage. Racquetball is one of these where hitting the ball hard is the most important thing but not the only important thing.
Players with only a minimal amount of study can get on the court and play a reasonably recognizable form of play. Like any sport, it takes practice to get good. But the rules are really very simple. If you know these five basic rules, you will go a long way toward having great fun with this great form of exercise.