Some suggestions: At present, the new curriculum standard textbooks are being implemented everywhere, so I suggest you read more textbooks; Watch more online teacher lecture videos; Practice your pen and chalk; Can do some basic courseware; Can write lesson plans for several classes; Find out how to take classes or something.
2. Moral education: It involves knowledge of pedagogy and psychology, which will test whether you can be a class teacher. These may be interviews or written tests. Please read the recruitment notice and follow the specific requirements.
Having said that, you'd better carefully check the recruitment notice of the Education Bureau and see the scope of their exams. You can also consult the relevant person in charge, whether to inspect teaching or moral education.
Wish you success!