School license
First of all, you should learn to check whether this institution is legally operated and whether it has a school license. It is best not to choose an institution without a school license to avoid being cheated.
on-the-spot investigation
Before choosing, you should go to the company of the training institution to check the number of applicants of this institution, whether there are physical stores, classrooms, equipment and so on. You can't sign up if you think you can still do it online. Field trips can avoid some risks. Then look at other candidates' comments on this institution.
Professional teachers
Whether there is a professional team of teachers is one of the important references for students to choose institutions. There are professional teachers in the training institutions of formal institutions, among which the education teachers will help you with your later homework, exams and graduation thesis, saving you a lot of unnecessary time.