Can drums be taught by themselves?

Yes, but you need to find a beginner's teacher, because you don't know how to hit, how to hold a stick and how to sit. Pay attention to asking the teacher these three questions in the first class. Some teachers don't pay attention to it, but these three problems are the key. Then you can download some videos to learn by yourself, such as those of Zhao Nian, Cao Ping and Xuan Lu. You can download it and have a look. By the way, you can find some drum friends to learn from each other and make great progress. Come on! You can keep asking questions.