If you just want to know the knowledge of Lunar New Year, online self-study is a very good method, but if you want to do it seriously and obey your family's orders, you still need to go through professional training and get a certificate before you can take up your post, because Lunar New Year study not only has theoretical knowledge, but also practical skills. It is difficult to acquire solid practical skills only through online learning.
You can't just listen to lectures online. Besides theoretical knowledge, you should also have hands-on learning. Only when you really get in touch with the nursing steps will you not be in a hurry when you work.
The courses of a professional monthly training institution are all a combination of theory and practice. You can pay more attention when you check, and be careful not to be cheated by informal month training institutions.