Scale: Choose a large offline entity workplace organization. After all, the network is a virtual space, and there is no physical store to feel more secure. Moreover, problems in the connection of the whole network can easily lead to hacking or no one can be found.
Teachers: It is more secure to choose full-time teachers to teach. On the one hand, full-time teachers represent the attitude that institutions hope for long-term development and are unwilling to make do with short-term part-time teachers. On the other hand, full-time teachers are more professional and single-minded, and pay more attention to students' feedback, curriculum improvement and teaching plan research and development than part-time teachers.
Course: For course candidates, you can try the organization's audition course. After all, what suits you is the best. You can look at the organization's audition course and choose a teacher whose lecture style is more suitable for you.
The above is a detailed answer to your question, I hope it will help you.