If you want to take the teacher qualification exam, you must first look at your own strength. I suggest you find a set of real test papers to test yourself and see how powerful you are. If there is a big gap with the ideal, I suggest you buy a line to work. If you have time, you'd better find a teacher to study offline. After all, it's very different to have someone take you to learn.
If you do well in the exam, you can review it yourself. Now you can download a lot of exam apps on your mobile phone, you can download a few more, take time to brush the questions every day, and simulate the exam twice on weekends. Then sort out the wrong questions, read and do more. I believe you can pass the exam through your own efforts.
I hope my answer can help you ~