Please calm down, because everyone's situation is different, everyone's learning methods are different, and everyone's acceptance is different. You have to learn this content according to your actual situation. Actually, you can learn by yourself. There are many free teaching videos on the internet, so you don't have to sign up for classes. Training institutions and intermediaries are all about making money. You don't care about anything after you pay the money. In fact, you are all self-taught. Come on, it's not easy to make some money. Don't worry.