You learn a sport like Table Tennis by playing against opponents in training and in matches. It is a game. You learn through trial and error. It is normal to make errors or mistakes, and it is normal to lose. The game is fun when you solve the problem that caused the mistake, and succeed in permanently implementing the solution. You do this all the time, even if you don’t think about it. The world of problems is endless, also for the professional elite players. The sport is developing. This is what makes the game of Table Tennis so challenging and fun for the curious mind, for the motivated learner.
The more mistakes you do, the faster you become better. But only if you learn from your mistakes. To speed up that process, it is good to learn from the mistakes done by others as well. At least some more common ones. You don’t have to make all the common mistakes yourself. And you don’t have to figure out the solutions all by yourself.